Steam using double the drive space.
Let me elaborate.
While installing a game or moving it from a drive to another it takes double space. After that it goes back to normal.
I tried to install Witcher 3 (about 50GB) on my SSD. It had 70 GB free space. After a while a popup appeared on my screen telling me that the C drive is full. The game wasn't fully installed either.

Is there something I'm missing?
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Showing 1-15 of 21 comments
Realigo Actual Dec 12, 2019 @ 11:53am 
This is not directly related to your point but I just wanna mention that at some point in time, Tekken 7 decided it no longer wanted to back up to 45~ gijjabijja and instead wants to only back up to the full 70+. shenanigans.
cinedine Dec 12, 2019 @ 12:28pm 
Download size is not install size! Downloads are already compressed. Also Steam first downloads a file before moving it to the actual directory, so with huge archive files you can easily take up double space.
Tharon Dec 12, 2019 @ 12:34pm 
Originally posted by cinedine:
Download size is not install size! Downloads are already compressed. Also Steam first downloads a file before moving it to the actual directory, so with huge archive files you can easily take up double space.

Moving a file on the same drive doesn't take or need space. The files are always in the same place, only the index in the file table (MFT) is changed.
Last edited by Tharon; Dec 12, 2019 @ 12:36pm
For me steam took up most of my 1tb hard drive kinda like around 400 or 800 GB.
Komrade Dec 12, 2019 @ 4:42pm 
You should leave your OS drive 20% empty minimum.
rawWwRrr Dec 12, 2019 @ 4:54pm 
Originally posted by PycassoClaudiu:
Is there something I'm missing?
more hard drive space
ranoutofcharac Dec 12, 2019 @ 9:21pm 
Originally posted by rawWwRrr:
Originally posted by PycassoClaudiu:
Is there something I'm missing?
more hard drive space
+1
PycassoClaudiu Dec 13, 2019 @ 8:16am 
Originally posted by rawWwRrr:
Originally posted by PycassoClaudiu:
Is there something I'm missing?
more hard drive space

I forgot to mention this. I also have 2x1TB half empty HDD drives. In the end I did install the game on one of those drives. That's how I noticed the game takes double the space while installing.

So, I still don't understand why steam does this.
D3AD Dec 13, 2019 @ 8:22am 
Hdd's also hit a point where they are full whitout being full due to page fileing... sounds like you are still using them... sdd's dont have a cap limit you can fill all 300 gigs of your 300 gigs and be fine... hdd's you never fully fill one... not one anyway you use for gaming... i would also suggest to get a secondary hardrive sdd . leave your c drive for windows and major programs you need to run... ( maybe 1-2 games you main ) than put all your games on a second drive. and than all picture/obs/vid storage on a third drive. after taht you;re set for years. btw . if any of your drives get to the point where you only have 50 between them. its time to upgrade as you leave your windows with next to no upgrade space and those require at least 10 gigs on the side. even though most never right more than 1
Last edited by D3AD; Dec 13, 2019 @ 8:25am
Mortem-Zequax Apr 22, 2020 @ 5:30am 
eny work around i would like to reinstall Middle-Earth :Shadow of war but only got 110,000 ish MB space and it take around 100,000 MB
Nx Machina Apr 22, 2020 @ 8:45am 
Originally posted by Zequax:
eny work around i would like to reinstall Middle-Earth :Shadow of war but only got 110,000 ish MB space and it take around 100,000 MB

Example:

Size on install screen 90gb.

Download size is reduced by approx 1/3 to 60gb.

Installed space required 150gb (60gb download + 90gb install).

Download is unpacked and written to install location.

Upon completion the 60gb space taken by download is freed up and the space becomes available again.

For piece of mind double the size indicated by the install screen.
rawWwRrr Apr 22, 2020 @ 11:21am 
Originally posted by Zequax:
eny work around i would like to reinstall Middle-Earth :Shadow of war but only got 110,000 ish MB space and it take around 100,000 MB
You shouldn't be limiting the free space of your hard drive like that. There's no reason to fill every byte. As a matter of fact, you do more harm to your system by doing so as it severely limits the space that it has to operate in, thereby slowing it down. You should always maintain a specific amount of open space, or what we call "overhead" . As you use files and they change, your drive needs somewhere to write to before it deletes the older version. You need space to download, decompress, decrypt, and install. Space is used for caching.

Either delete some games already on it that you're not playing or invest in a bigger or extra hard drive.
crunchyfrog Apr 22, 2020 @ 1:53pm 
Originally posted by PycassoClaudiu:
Originally posted by rawWwRrr:
more hard drive space

I forgot to mention this. I also have 2x1TB half empty HDD drives. In the end I did install the game on one of those drives. That's how I noticed the game takes double the space while installing.

So, I still don't understand why steam does this.

It's simply because it doesn't just dump the game as it ends up. It's encrypted data, so it needs to reserve both the space it will need for it's eventual storage PLUS workspace to do all the fiddly unencrypting.

So it's usually about double the space and somtimes more.

Think of it like this - physical filing with paper a filing cabinets. You are moving one file to another cabinet - easy. Same space needed. But what if that file needs to be reorganized before refiling. Well then you need a table to sort it on, then the final space in the filing cabinet. You see?
crunchyfrog Apr 22, 2020 @ 1:54pm 
Originally posted by Zequax:
eny work around i would like to reinstall Middle-Earth :Shadow of war but only got 110,000 ish MB space and it take around 100,000 MB

That is not something you should be doing AT ALL.

Valve recommend that you reserve at least 10% of your drive, pereferably more as it will affect performance and stability.
Elee Tadpole Dec 1, 2020 @ 8:33am 
Sorry to necro this, but I had the same issue. Once I had the game installed I went to the properties for the game on steam, then to local files, and then pressed "verify integrity of game files." Witcher 3 went from taking up over 100gb to around 50-60 which is what you would expect. This won't help if you don't have enough space to download it in the first place though.
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Date Posted: Dec 12, 2019 @ 11:46am
Posts: 21