The platform rule decides this before the price does: Sony states that PS4 games play from USB extended storage and PS5 games do not. So an external drive is an archive for PS5 titles and a play surface for PS4 ones, while an M.2 drive is the only storage PS5 games run from.
Prices updated · live figures update every 4-5 hours
Cheapest live listing on each path at each capacity. A dash means we hold no live listing for that path at that size - it is a gap, not a zero.
| Capacity | Internal M.2 | External SSD | External HDD | Runs PS5 games? |
|---|---|---|---|---|
| 1 TB | $153/TB $152.99 | $160/TB $160.00 | - | M.2 only |
| 2 TB | $123/TB $245.99 | $139/TB $278.95 | - | M.2 only |
| 4 TB | $109/TB $436.99 | $125/TB $499.99 | $35/TB $139.99 | M.2 only |
Requirements from Sony's M.2 installation guide and its USB storage page.
This comparison is unusual because the cheaper option is not a cheaper version of the same thing. The two paths do genuinely different jobs, and Sony's platform rules rather than the price tags are what separate them.
An internal M.2 drive becomes part of the console's storage. PS5 games install to it and run from it, and once fitted you stop thinking about which drive a game lives on. Sony publishes the requirements: PCIe Gen4 M.2 NVMe, a stated sequential read floor of 5,500 MB/s, a heat-dissipation structure, and dimensional limits including heatsink height.
An external USB drive is extended storage, and the rule that matters is that PS4 games can be played from it while PS5 games cannot. A PS5 game can be moved to USB and moved back, which beats deleting and re-downloading, but it will not run from there. Sony also requires a SuperSpeed USB connection at 5Gbps or above, connected directly rather than through a hub.
So the first question is not what you can afford. It is what your library is. A shelf full of PS4 titles makes external storage a genuine play surface and changes the economics completely; a rotation of current PS5 games makes it an archive and nothing more.
The table above puts the three paths on the same per-terabyte basis at each capacity where we hold live listings, which is the only fair way to compare them - a headline price hides that you are buying different amounts of storage.
The ordering is consistent and unsurprising: external hard drives are cheapest per terabyte, external SSDs sit in the middle, and internal M.2 drives cost the most. What the table shows that a rule of thumb does not is the size of the gaps today, and they are large enough to change decisions rather than just confirm them.
Read it alongside the platform rules rather than on its own. The cheapest column is only relevant if the job it does is the job you need. Paying several times more per terabyte for M.2 storage is rational when it is the only storage your games will run from.
One spec note on the external side: USB connections have their own ceiling, and a portable SSD on a SuperSpeed connection will not deliver what the same drive does on a direct PCIe connection inside a machine. That is a property of the connection rather than of the drive, and it is why an external SSD is a faster archive rather than an alternative to internal storage.
A large PS4 library makes external storage the obvious first purchase. Those games play directly from USB, the per-terabyte cost is the lowest of the three, and a cheap high-capacity hard drive can hold a very large back catalogue for the price of a fraction of an M.2 drive.
An active PS5 rotation makes internal M.2 the only real answer. If the games you are playing this month are PS5 titles, external storage does not help you play them - it only helps you avoid re-downloading them later. The M.2 upgrade is what stops the deleting.
An archive hoarder - someone who wants to keep everything they have ever bought without re-downloading - is best served by external hard drive capacity, because the job is retention rather than play, and price per terabyte is the whole decision.
The combination is what most people with both a PS4 library and an active PS5 rotation actually need, and it is frequently cheaper than either extreme. A modest M.2 drive for the games in rotation plus a large cheap external for everything else costs less than an M.2 drive big enough to hold the lot, and the arithmetic above lets you price that pairing directly.
One piece of context belongs here as a specification rather than a benchmark, because it explains a result people find confusing: an external SSD on a USB connection does not behave like the same memory would inside the machine.
USB has its own bandwidth ceiling, and it sits well below what a PCIe Gen4 connection provides. The console requires SuperSpeed USB at 5Gbps or above for extended storage, and that figure is the ceiling of the link rather than of the drive. A fast portable SSD connected that way is limited by the road, not the engine.
That is why an external SSD is best understood as a faster archive rather than as a cheaper alternative to internal storage. It moves games on and off the console more quickly than a hard drive does, which is a genuine convenience when you are shuffling a library, and it does not change what the platform allows.
It also means paying for the fastest available portable SSD is money spent on a figure the connection cannot deliver - the same logic that applies to over-specifying an internal drive above Sony's requirement floor. For the archive job, capacity per pound is the sensible axis.
One workflow point that decides how well the combination works in practice: moving a game between internal and external storage is a local copy rather than a download, and that is the whole reason the pairing is worth having.
A PS5 game parked on an external drive and brought back when you want it costs you a transfer over USB. The same game deleted and reinstalled costs you the full download again, over whatever connection you have, and on a metered or slow line that is a materially different price. The external drive is buying you the difference between those two.
That also sets the sensible rhythm for the combination. Games in active rotation live on the internal drive; games you have finished but might return to move out to the external; games you are certain you are done with can be deleted, because the storefront will still have them.
It is worth doing that housekeeping before you buy rather than after. People frequently discover that moving three finished games out of the way solves the problem they were about to spend money on, and the storage calculator will tell you whether that is you.
If you are buying one thing and you play PS5 games: buy the M.2 drive. The external is cheaper and it does not solve your problem.
If you are buying one thing and your library is mostly PS4: buy the external. It plays those games directly and the money goes much further.
If you are buying both, size the M.2 drive to your active rotation rather than your whole library, and let the external carry the rest. Our storage calculator estimates what the rotation actually needs using approximate install sizes.
And whichever you buy, buy on capacity rather than on headline speed. Sony's requirement floor is a threshold: a compliant drive satisfies the console, and the money is better spent on gigabytes than on a specification number the platform will not use.
External drives for consoles has the deep external picks · PS5 storage full is the triage version of this decision · 1TB or 2TB sizes the M.2 side · heatsinks and the install guide cover fitting it.
No. Sony's documentation is explicit that PS4 games can be played from USB extended storage while PS5 games cannot. You can move a PS5 game to an external drive and back again, which is much faster than deleting and re-downloading it, but the game will not launch from the external drive.
External hard drives, consistently, with external SSDs in the middle and internal M.2 drives the most expensive. The live table above shows today's figures at each capacity. That ordering only matters once you have decided which path does the job you need, because they are not interchangeable.
Speed is not the obstacle - the platform rule is. PS5 games do not run from USB storage regardless of how fast that storage is. An external SSD moves games to and from the console faster than a hard drive does, which is a real convenience, but it does not make them playable from the external drive.
It is the right answer for a lot of people, and often cheaper than either alone. A modest M.2 drive covers the PS5 games you are actively playing and a large cheap external holds the archive and any PS4 library. That combination usually costs less than an M.2 drive sized to hold everything.
Size it to your active rotation rather than your whole library, especially if you are also buying an external. Current AAA games commonly run around 100 to 200GB installed - our storage calculator works from approximate per-title figures - and our 1TB-versus-2TB page covers the capacity decision with the live marginal cost of the jump.
You cannot use one for this. Sony requires extended storage to be connected directly, and a drive behind a hub will not be accepted. It also requires SuperSpeed USB at 5Gbps or above.