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BlackIce 21st December 2012 07:15 PM

Steam can now be installed onto multiple drives
I never saw an announcement, and the FAQ has no mention of it. However when I went to install a game today it asked me which SteamLibrary I wanted to install to.
As someone who's list of owned steam games is larger then the capacity of my fast hard drives this has always been an issue.
Install onto my fast disk drive, but only have the current big titles, or use a slower drive that can hold more?
Since a lot of the games need the performance I am using my Fast, but Small, drive. Unfortunatly that meant even the games that did not require fast disk access were forced to take space alongside my more important AAA titles, or just not get kept on my PC at all.

Todays discovery has changed all that, so I am in the middle of seperating my lesser titles onto my slower drives.

Since it took a bit of experimenting to figure out how to transfer the files without requiring a full download, these are the steps that seem to work. Normally just having the files in the right directory and restarting steam is all that is required, but it seems steam still only looks at the primary install location. It will not spot the files present in the additional drives.

From withing Steam:
1. Install a new title, which will allow you to chose a new drive and create a new SteamLibrary on it.
Either let the game download completely, which will create the full file structure needed, or manual create the folders.
From within Windows Explorer
2. The full structure needed is (Drive:)\[SteamLibrary]\SteamApps\common\
3. Manually copy the game folders from your current Steam Install folder into the new library. (eg, I am copying from G:\steam\steamapps\common\Bastion to H:\steam\steamapps\common\Bastion)
From withing Steam:
4. Right Click on the title you just copied, and choose Delete Local Content
This will uninstall the game from the original location.
5. Right Click the title you just deleted, and choose Install Game. Choose the new drive from the list (for me it is H:\SteamLibrary)
6. Steam will now start to prepare the install and will go a new stage called Discovering existing files
7. Complete. Repeat steps 3 to 5 for each game you want to move.

BlackD 22nd December 2012 01:02 PM

Nice :) This has been in the beta for a couple of months now, but it's good to see it go live so everyone can take advantage of it!

I should add, when moving games like this, some titles also put some pertinent files (.ncf and .gcf) directly into the steamapps folder. When moving games, ensure to make backups of these files before uninstalling in case it removes them.

For most titles, these files are small and insignificant (and re-downloading will only take seconds), but some put almost all their game content in .ncf files (primarily, the Source games - TF2, CSS, etc). Any shared files it won't remove when uninstalling, but other games are a different matter - always a good idea to backup just in case. :)

Thermal Ions 31st December 2012 08:49 PM

As BlackD indicates, most Source games put the majority of their content in ncg/gcf files in the steamapps directory. As a result, Steam won't let you choose to install these games into a secondary install location - the option never shows in the install dialog. You'll therefore still need to ensure you've enough room for these in your primary steam install location, or muck around with symbolic links.

TheShrub 8th January 2013 02:39 AM

Thank you BlackIce I can now use this route rather than delete and re-download to change from my SSD drive to my 1Tb one.

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