Three drives, three different jobs
Price check — 27 September 2026: the linked listings showed AU$599 for the 990 EVO Plus 2TB at Scorptec, AU$569 for the 870 EVO 1TB at PLE Computers and AU$349 for the IronWolf 4TB on eBay Australia (seller smarthomestoreau). These are storage-type examples, not lowest-price claims. Compare current alternatives before buying, especially the SATA SSD. Prices, delivery charges and availability can change.
SSD first; choose capacity for your files
A compatible 1TB NVMe SSD is a sensible starting point for many new PCs. Move to 2TB for games, photography and more room to grow. The Samsung 990 EVO Plus 2TB is the featured example; the best purchase still depends on compatibility and the price on the day.
Choosing computer storage is not simply a matter of buying the largest hard drive you can afford. Capacity determines how much you can keep, while the drive type affects how quickly Windows starts, programs open, games load and large files move. The most practical setup for many Australians is a fast solid-state drive for everyday use, with a hard disk added only when inexpensive bulk storage is genuinely needed.
The three storage examples at a glance
- Samsung 990 EVO Plus 2TB (MZ-V9S2T0BW): Fast active storage for a compatible NVMe slot.
- Samsung 870 EVO 1TB (MZ-77E1T0BW): Responsive storage for a compatible SATA system.
- Seagate IronWolf 4TB (ST4000VN006): NAS-oriented hard drive for large file collections.
How these examples were chosen
These models illustrate NVMe SSD, SATA SSD and hard-drive buying decisions. We checked exact Australian model listings, manufacturer information and the connection each needs. This is a research-led guide, not hands-on testing or a claim that these are the three cheapest drives. The featured desk scene and backup scene are illustrations.
Samsung 990 EVO Plus 2TB (MZ-V9S2T0BW)
A capable 2TB NVMe example for Windows, games and active projects.
This M.2 2280 drive uses PCIe 4.0 ×4 or PCIe 5.0 ×2 and is rated for sequential reads up to 7,250MB/s. Those are manufacturer limits, not speeds we measured. Check the exact slot and available cooling before buying.
Why it suits this role
- Room for a growing game or project library
- No SATA data or power cables
What to consider
- Requires a compatible NVMe slot
- Current price needs comparison with competing 2TB drives
Best suited to: A compatible modern PC where SSD responsiveness and 2TB capacity suit the workload.
Samsung 870 EVO 1TB (MZ-77E1T0BW)
A familiar 2.5-inch SATA option for a machine without suitable NVMe support.
The 870 EVO illustrates the SATA upgrade path: a 2.5-inch housing and SATA data and power connections. It is not an M.2 drive. Its manufacturer-rated sequential read and write limits are 560MB/s and 530MB/s. At the price checked, do not assume it is a good-value upgrade simply because it uses an older interface.
Why it suits this role
- A substantial responsiveness upgrade from an HDD
- Silent operation without moving parts
What to consider
- Limited by SATA throughput
- Needs a suitable bay and connections; price can be poor value
Best suited to: An older compatible desktop or laptop where a SATA SSD is the practical upgrade route.
Seagate IronWolf 4TB (ST4000VN006)
A NAS-oriented hard drive for capacity, rather than Windows responsiveness.
This 3.5-inch IronWolf is a SATA hard drive intended for NAS workloads. It illustrates where bulk storage fits beside an SSD. Confirm your NAS compatibility list or desktop bay, SATA data connection and power supply. A second drive inside the same computer is not an independent backup.
Why it suits this role
- More capacity than the SSD examples here
- Suitable category for bulk files and compatible NAS use
What to consider
- Mechanical noise and slower access than SSDs
- Not the preferred main Windows drive
Best suited to: A compatible NAS or bulk-file role where capacity matters more than fast access.
How much computer storage do you need?
| Capacity | Suitable for | Better Life Decisions guidance |
|---|---|---|
| 256GB | Very basic cloud-focused use | Too restrictive for most new Windows computers |
| 512GB | Basic office, study and light home use | Acceptable on a strict budget if files are modest or stored elsewhere |
| 1TB | General home use, work and a modest game library | Best minimum for most new computers |
| 2TB | Gaming, photography, creative work and longer ownership | Best all-round capacity for many enthusiast PCs |
| 4TB | Large game libraries, high-resolution photos and video | Choose SSD for active work or HDD for economical bulk storage |
| 8TB or more | Video archives, media libraries, surveillance and local backups | Hard drives normally offer better value per terabyte |
HDD, SATA SSD and NVMe SSD compared
| Drive type | Main strengths | Main limitations | Best use |
|---|---|---|---|
| 3.5-inch HDD | High capacities and low cost per terabyte | Slow, audible, vulnerable to shock and mechanically complex | Bulk files, archives and a properly designed backup copy |
| 2.5-inch SATA SSD | Quiet, responsive and widely compatible | Limited by the SATA interface and requires cables in desktops | Upgrading an older SATA computer or adding affordable SSD capacity |
| M.2 SATA SSD | Compact and cable-free | SATA performance despite resembling an NVMe drive | Systems whose M.2 slot supports only SATA or both interfaces |
| M.2 NVMe SSD | High throughput, low latency and no data cable | Compatibility, heat and real-world benefits vary by model and workload | Windows, applications, games and active creative projects |
| External HDD | Portable high capacity at modest cost | Slow and vulnerable to drops while operating | Offline backups and transporting large collections carefully |
| External SSD | Fast, silent and resistant to ordinary movement | Higher cost per terabyte and limited by its USB connection | Portable working files, travel and fast transfers |
What is a hard disk drive?
A hard disk drive, or HDD, stores information magnetically on spinning platters. A moving actuator positions read-and-write heads above those platters. This mature technology provides very large capacities at a relatively low cost, but mechanical movement makes it slower and more susceptible to vibration or physical shock than solid-state storage.
Hard drives remain worthwhile when capacity matters more than responsiveness. They suit large photo collections, completed video projects, media libraries and additional backup copies. They are poor choices for a new Windows boot drive because even an inexpensive SSD makes everyday computing feel substantially faster.
What is a solid-state drive?
A solid-state drive, or SSD, stores information in flash memory and has no spinning platters or moving read head. This provides much faster access, silent operation, lower latency and better resistance to ordinary movement.
SSDs are available through different physical formats and interfaces. The word SSD therefore does not tell you how the drive connects or how fast the complete system can use it.
SATA SSD vs NVMe SSD
SATA was designed around older storage technology and is used by both hard drives and SSDs. A 2.5-inch SATA SSD usually connects using separate data and power cables. Some older M.2 drives also use SATA internally.
NVMe drives communicate through PCI Express and are designed for solid-state storage. They can provide much greater sequential throughput and lower latency than SATA SSDs, particularly during large transfers and demanding professional work.
The difference is not equally obvious in every task. Both make Windows and ordinary applications much more responsive than a hard drive. Paying heavily for the fastest flagship NVMe drive may deliver little noticeable improvement in email, browsing or basic office work.
M.2 is a shape, not a speed
M.2 describes a physical form factor and connector. An M.2 drive may use SATA or PCIe/NVMe, and an M.2 slot may support one interface, both or neither for a particular module type.
The common desktop size is M.2 2280, meaning approximately 22mm wide and 80mm long. Smaller laptops and handheld devices may use shorter drives. Always check the exact computer or motherboard manual before ordering.
PCIe generations explained
NVMe SSDs may be advertised as PCIe 3.0, 4.0 or 5.0. Each newer generation can provide more potential bandwidth, but only when the drive, slot and system support it. A newer drive commonly works in an older compatible slot at the older connection's speed, but the manual should confirm this.
For most home and gaming computers, a good PCIe 4.0 NVMe SSD offers an excellent balance of speed, heat, price and compatibility. PCIe 5.0 can benefit demanding file transfers and professional workloads, but may cost more and require substantial cooling without noticeably improving ordinary use.
How to calculate the capacity you really need
- Open Windows Settings, then System and Storage.
- Record how much space applications, games, photos, video and other files currently consume.
- Add any files stored on external drives that you want available internally.
- Allow for future games, camera upgrades, work projects and household users.
- Add comfortable free space rather than buying a drive that will immediately be almost full.
A practical approach is to total your current genuine use, add known future requirements and then move to the next common capacity. Someone already using 700GB should usually choose 2TB rather than squeezing into a nominal 1TB drive.
Why the usable capacity looks smaller
A drive sold as 1TB will not normally appear as a full 1TB of usable space in Windows. Drive manufacturers and operating systems may represent capacity using different decimal and binary conventions. Formatting, recovery partitions and system files also consume space.
This does not usually mean the retailer supplied the wrong product. Check the model and total reported capacity before assuming the drive is faulty.
Storage for gaming
Modern games can consume well over 100GB each once updates and optional content are included. A 1TB drive can therefore become restrictive surprisingly quickly. A 2TB NVMe SSD is a strong choice for a new gaming PC, with additional storage added later if the motherboard provides another suitable slot.
Keeping active games on an SSD improves installation, updating and loading compared with a hard drive. The fastest benchmark result does not necessarily produce proportionally shorter loading times, so capacity and dependable performance often provide better value than a premium flagship model.
Storage for photos and video
Photographers should estimate storage using their camera's typical raw-file size and annual image volume. Video capacity depends heavily on resolution, frame rate, codec, bit rate and project structure. Proxy files, cache files and exports can consume far more space than the original footage alone.
A useful creative setup is:
- a fast NVMe SSD for Windows and applications;
- a second SSD for active projects, cache or scratch files where the software benefits;
- a large HDD or network device for completed projects; and
- an independent backup that is not permanently exposed to the same failure or malware event.
Should you use one large drive or several drives?
One large SSD is simple, quiet and easy to manage. Multiple drives can separate active work from archives, expand capacity gradually or make reinstalls more convenient. They do not automatically protect data.
Partitioning one physical drive into C and D does not create a backup. If that drive fails, both partitions may disappear. Likewise, storing the only backup on a second internal drive leaves both copies exposed to theft, power damage and some malware.
SSD specifications that matter
Endurance
Manufacturers may specify endurance as terabytes written, commonly abbreviated TBW. Higher endurance can matter for continuous heavy writing, but ordinary home users often write far less than the warranty allowance.
Warranty
Compare the warranty period and any write-limit conditions. A long warranty is useful only when the manufacturer provides practical Australian support and the drive remains eligible.
NAND and cache design
Drives can use different flash types and caching arrangements. Performance may fall after a fast write cache fills, especially on lower-cost or nearly full models. Professional users moving very large files should examine sustained performance rather than only the advertised peak.
Thermals
Fast NVMe drives can become hot and reduce performance to protect themselves. Use the motherboard heatsink or a suitable drive heatsink when recommended, remove the thermal-pad film and maintain case airflow.
Hard-drive specifications that matter
Capacity and price are only the beginning. Check whether the HDD is designed for ordinary desktop use, network-attached storage, surveillance or another workload. Examine workload limits, warranty, noise and power requirements.
For important arrays or sustained writing, investigate whether a model uses conventional magnetic recording or shingled magnetic recording. Some shingled drives can slow substantially during particular rewrite workloads and may be unsuitable for certain RAID or NAS uses.
External drives and USB speed
An external drive can perform only as well as the drive, enclosure, cable and computer port allow. USB-C describes the connector shape, not a guaranteed speed. Two USB-C ports can support very different transfer rates.
Use the supplied or correctly rated cable and connect a high-speed SSD to an appropriate port. A fast NVMe drive in a slow enclosure or USB port will operate at the connection's limit.
Do you need a heatsink?
Many ordinary PCIe 3.0 and 4.0 drives work well beneath a motherboard's included M.2 heatsink. Higher-performance drives, compact cases and sustained transfers may create more heat. Follow the SSD and motherboard instructions rather than stacking heatsinks or thermal pads.
For a PlayStation 5 upgrade, follow Sony's current dimensional and cooling requirements rather than assuming a bare PC drive is automatically suitable.
How much free space should you keep?
A drive should not be purchased with the expectation that every advertised gigabyte will remain filled. Windows updates, temporary files, application caches and SSD background management all benefit from breathing room.
There is no universal percentage that suits every drive and workload, but regularly operating with almost no free space is a warning sign. If cleaning temporary files only delays the problem briefly, increasing capacity is more sensible than constantly micromanaging storage.
Backup properly
A useful starting principle is to keep three copies of important information, on at least two different storage arrangements, with one copy separated from the main computer. The exact design depends on the value, privacy and size of the data.
Options can include:
- the working copy inside the computer;
- an external drive disconnected after backup;
- encrypted cloud storage;
- a network-attached storage system with suitable protection; and
- an off-site copy kept away from the same fire, theft or electrical event.
Synchronisation is convenient but is not always a complete backup. Deleting or corrupting a synchronised file may replicate the change. Confirm version history and practise restoring a test file.
Compatibility checks before buying
- Check the exact motherboard, laptop or prebuilt-computer manual.
- Confirm available M.2 slots, supported lengths and SATA or NVMe compatibility.
- Check the supported PCIe generation and lane-sharing restrictions.
- Confirm spare SATA data ports and power connectors for 2.5-inch or 3.5-inch drives.
- Check physical drive bays and mounting hardware.
- Confirm the operating system can boot from the intended slot.
- For laptops, check whether opening the device affects service arrangements.
- Confirm whether cloning software or a clean operating-system installation will be used.
Mistakes to avoid
- Calling every drive a hard drive: HDDs and SSDs use fundamentally different technology.
- Buying too little capacity: A nearly full new drive creates immediate inconvenience.
- Using an HDD as the main drive: It makes a new computer feel unnecessarily slow.
- Assuming M.2 means NVMe: M.2 describes the form factor, not necessarily the interface.
- Paying for benchmark numbers: Peak speed may not improve your normal workload.
- Ignoring motherboard lane sharing: Adding one drive can disable another port on some boards.
- Using unknown second-hand drives: Remaining life and handling history can be uncertain.
- Treating RAID as backup: Redundancy does not protect against every failure or deletion.
- Keeping only one copy: No drive is sufficiently reliable to hold the only copy of an important file.
A practical buying process
- Measure current storage use during normal ownership.
- Estimate future games, photos, video and work files.
- Choose SSD storage for Windows, applications and active files.
- Select at least 1TB for most new PCs or 2TB for gaming and heavier use.
- Add an HDD only when large economical capacity is more important than speed.
- Confirm form factor, interface, length, PCIe generation and physical clearance.
- Compare sustained performance, endurance, warranty and Australian support.
- Budget for backup rather than spending everything on the main drive.
- Install the drive correctly and check temperatures and health information.
- Test your backup by restoring a file before trusting it.
Frequently asked questions
Is a 1TB SSD enough?
It is a sensible minimum for most new computers and enough for general home or office use. Gamers, photographers and people keeping large local collections may find 2TB more comfortable.
Should I buy an HDD or SSD?
Choose an SSD for Windows, programs, games and active work. Choose an HDD when you need several terabytes of economical bulk storage and can accept lower speed and mechanical noise.
Is NVMe noticeably faster than SATA?
It is substantially faster in technical measurements and demanding transfers. Ordinary users may notice a smaller difference than the benchmark numbers suggest because both are responsive compared with a hard drive.
Is 2TB excessive for a home computer?
No. It provides useful space for games, family photos, applications and future growth. It may be unnecessary for someone who stores nearly everything in the cloud and uses only basic applications.
Can I install a PCIe 5.0 SSD in a PCIe 4.0 slot?
Many PCIe devices are backward compatible and will operate at the slower connection's limit, but the exact motherboard and drive documentation should confirm compatibility.
Does an SSD need defragmenting?
Do not manually treat an SSD like an old hard drive. Modern Windows versions optimise drives appropriately, including using TRIM for supported SSDs.
How long will a drive last?
No exact lifespan is guaranteed. Workload, temperature, manufacturing variation, physical handling and electrical events all matter. Monitor health where useful, but maintain backups because warning systems cannot predict every failure.
Sources and further reading
- Microsoft Support: Manage drive space with Storage Sense
- Microsoft Support: OneDrive Files On-Demand
- Seagate: How HDDs and SSDs store data
- Crucial: SSD types, form factors and interfaces
- Crucial: SSD vs HDD
- Samsung Semiconductor: SATA vs NVMe SSDs
- Samsung Semiconductor: Internal SSD information
- Samsung Australia: 990 EVO Plus 2TB — MZ-V9S2T0BW
- Samsung Australia: 870 EVO 1TB — MZ-77E1T0BW
- Seagate: IronWolf NAS hard drives
- Kingston: SSD form factors
Product listings and prices checked 27 September 2026. Manufacturer speed ratings are maximum specifications, not measurements made by Better Life Decisions. Retailer links are ordinary product links.
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