Rockstar has not confirmed GTA 6's install size. The 676GB figure circulating widely is fake — it started as a joke and got repeated as fact. So has every other precise number you've seen.
That doesn't make planning impossible. It makes the planning conservative.
A realistic working estimate
Rockstar's recent releases give a usable floor. Red Dead Redemption 2 shipped at around 99GB on console and roughly 150GB on PC with the high-resolution textures. GTA 5 launched at 65GB and grew past 105GB across a decade of updates. Modern open-world AAA releases have only trended larger.
Add a day-one patch, which large releases reliably ship, and the decompression headroom a console needs during installation. Then remember GTA Online is coming later and will add to the footprint rather than replacing it.
Plan for at least 250GB of free space. That covers a large base install, a substantial launch patch, and the first wave of post-launch content without forcing you to uninstall three games at midnight.
The PS5 constraint most people don't know
This is the important one. PS5-native games must be installed on internal storage — either the built-in SSD or an M.2 NVMe drive fitted in the expansion bay. An external USB SSD can store and move PS4-compatible games, but it cannot run PS5 titles.
So a cheap external drive, which is genuinely useful for a back catalogue of older games, will not help you here. If you're on PS5 and short on space, you need an internal M.2 expansion. There's no cheaper route.
Buy one sold with a low-profile heatsink already attached. The alternative is matching a bare drive to a separately-bought heatsink and getting the height right yourself, which works but adds a variable you don't need.
| Platform | What runs GTA 6 | What doesn't |
|---|---|---|
| PS5 / PS5 Pro | Internal SSD, or an M.2 NVMe expansion with heatsink | External USB drives — PS4 titles only |
| Xbox Series X|S | Internal storage, or the proprietary expansion card | USB drives can store it but not run it |
| Xbox Series S | Internal or expansion card — and space is tight | The smallest storage budget of any supported machine |
Xbox Series S owners: check your free space now
The Series S has the least usable storage of any machine GTA 6 supports, and Microsoft has now discontinued the 2TB model entirely as part of the August 1 pricing changes. If you're on a Series S, an expansion card isn't a nice-to-have — it's likely the difference between installing GTA 6 and choosing between it and everything else you own.
The proprietary card is the most expensive storage per gigabyte in console gaming. That's unfortunate and it's also the only option for running current-generation titles externally. A cheap USB drive alongside it is still worth having for older backwards-compatible games, which shifts pressure off the internal drive.
Buy the right standard, now
The standards aren't interchangeable and an opened drive is hard to return. Match your platform, buy 2TB if you can, and do it before the November rush moves pricing.
The free option first
Before spending anything, look at what's installed. Most people are carrying 200GB or more of games they finished a year ago and haven't launched since. Digital purchases redownload; disc-based installs reinstall. Deleting a finished game costs you a download later and nothing else.
Work through the list, delete anything you haven't opened in six months, and see where that leaves you. If it gets you past 250GB free, you've saved the cost of a drive. If it doesn't, you now know exactly how much expansion you need rather than guessing.
Why buying now beats buying in November
Two reasons, and both are already visible. Microsoft explicitly attributed its August 1 console price increase to storage and memory costs rising more than 2.5x, with further increases anticipated. That pressure applies to drives as much as consoles.
Second, demand. A launch of this scale pulls a large number of people toward the same purchase in the same fortnight, and that has never once made a component cheaper. Whatever you're going to buy, buying it in August or September rather than mid-November is the same product at a better price.
What holds up
- 250GB of headroom covers the install, the patch and early updates
- Deleting finished games is free and often enough on its own
- 2TB remains the value sweet spot on price per gigabyte
- Cheap external drives still help by holding older backwards-compatible titles
What doesn't
- PS5-native games cannot run from external USB drives
- Xbox's proprietary card is the priciest storage per gigabyte in console gaming
- Series S owners have the tightest budget and lost the 2TB option
- Component costs are rising, not falling, through the rest of 2026
The verdict
BUY, and buy it before October. Clear out finished games first — that's free and it might be enough. If it isn't, get the correct standard for your platform: an M.2 NVMe with heatsink for PS5, the proprietary card for Xbox. External USB drives will not run this game on either machine.
Target 250GB of free space. Ignore every specific install-size figure you see until Rockstar publishes one.