PS5 expansion SSDs

Drives that meet Sony’s stated floor for the console’s expansion slot, and what that floor rules out.

Sony publishes a minimum sequential read for expansion drives, and a drive below it will not be accepted by the console however good it is otherwise. That requirement, plus a heatsink that fits the bay, is what separates this class from ordinary NVMe drives — most of which are the same drives with different packaging.

What an ordinary ps5 ssd looks like

Medians, with values beyond 1.5× the interquartile range excluded so one listing cannot move them. A class holding fewer than 8 drives publishes no baseline at all.

How this class is distributed

21 drives in this corpus sit in this class. By capacity:

Sony sets a floor, and it excludes most drives

The console requires an M.2 NVMe drive meeting a stated minimum sequential read, and that requirement is why this class looks the way it does: the drives that qualify are the fast ones, so the median here sits far above the wider NVMe class. It is not that PS5 drives are special hardware. It is that the specification filters out everything slow, and a listing marketed for the console is usually making a claim about clearing that bar rather than about anything the drive does differently.

The heatsink is the constraint, not an accessory

Sony requires a heatsink and the bay has limited clearance, which makes physical fit the most common reason a correctly specified drive does not work. A drive sold with a heatsink already fitted has been designed to that clearance; a bare drive plus a separately bought heatsink may not close the cover. The dimensions are published for both and are worth checking against each other before ordering, because every other specification is irrelevant if the drive does not physically go in.

Why the write speeds here are unusually high

Write figures in this class sit far closer to read figures than they do in the wider NVMe class, and that follows from the same filter: drives fast enough to clear the read requirement are generally built with the controller and flash to write quickly too. For a console that installs very large games and copies them between storage, the write rate is the number felt most often, and it is the one the console’s own requirement does not actually specify.

Capacity, and what games really take

Modern titles run to substantial fractions of a terabyte each, and the internal storage fills faster than most owners expect. The practical question is how many games need to be installed at once rather than how many exist, because moving a game back from slower storage takes minutes rather than the hours a re-download does. Buying one size up is the cheaper mistake here: price per terabyte falls as capacity rises, and the alternative is uninstalling something every time a new game arrives.

Fitting it

The bay is user-accessible and the process needs one screwdriver, and the console formats the drive itself on first boot. What cannot be undone easily is buying the wrong physical size or a drive whose heatsink fouls the cover, so the checks worth doing are all before purchase rather than during installation. The console reports the drive’s measured read speed after formatting, which is the only figure in this whole class that was taken from your hardware rather than a datasheet.

Endurance, and the number that is easy to over-worry about

SSDs are rated in terabytes written, and the figure sounds alarming until it is divided by a realistic write rate. A rating of a few hundred terabytes written, against a typical desktop workload of a few tens of gigabytes a day, is measured in decades rather than years. Endurance matters where writes are genuinely heavy — video capture, a busy database, a drive used for constant large transfers — and for most machines the drive is replaced for being small long before it is worn out. The warranty usually expires at whichever comes first, so it is worth reading both numbers together.

Why the capacity you get is smaller than the one you bought

Drive manufacturers count a terabyte as a trillion bytes; operating systems generally count it as 2^40, about ten per cent more. A 1 TB drive therefore shows as roughly 931 GB before a single file is written, and nothing is wrong. Some SSDs also reserve a further slice as spare area for wear levelling, which the controller uses and the operating system never sees. Neither figure appears on a listing, and together they are the most common reason a new drive looks short on arrival.

What the drive does and does not change

An expansion drive stores and runs PS5 titles at effectively the same speed as the internal storage, which is the point: games installed there need no copying before they run. What it does not do is make any game load faster than it does internally, because the console’s own storage already meets the same specification. PS4 titles are a separate case — they can live on cheap external USB storage and run from it, so buying M.2 capacity for them spends the expensive storage on the games least able to use it.

Warranty, and the unfamiliar names in this class

Warranty is stated on only a few of these listings, and this class carries a higher share of unfamiliar brands than any other here — the requirement is a speed figure, and meeting a speed figure is cheaper than building a reputation. That is not a reason to avoid them, but it is a reason to read what is actually promised. A drive that clears the console’s bar and carries a multi-year warranty from a manufacturer with a support channel is a different proposition from one that clears the bar and says nothing else.

Reading these figures

Every number above is a median of what manufacturers publish, not a measurement we took. Where a specification is missing from this table it is because too few listings in the class stated it for a median to mean anything — that is a fact about the listings, not about the drives.

Narrow this class by capacity and budget in the ssd finder.

Computed from the corpus on 2026-08-29.