Two more reasons to hate Steam.
1. I didn’t fancy downloading 13GB of LA Noire when I knew a friend had it. So I leeched it and then when I click “Install” in Steam it tells me it’s going to “convert it to a more efficient format”. Sounds great but what Steam really meant is – “I’m going to just delete all those old files and redownload completely new ones without consulting you”. 13GB! FUUUUUUUUUUUUUU!
2. I bought a shiny new 2TB hard disk to dump Steam and all my other games onto. I did a quick search for the best way to move Steam which involved deleting everything in the Steam folder except the Steam.exe and the Steamapps folder. Unfortunately these guides forgot to mention that some Steam games (in my case Dishonored and Deus Ex: Human Revolution) store their saved games in the userdata folder and not in My Documents or My Saved Games or somewhere sensible. BAM! All progress wiped.
Here‘s a site with a list of savegame locations in case you hit a problem like this.