how to restore steam backup
1 From Steam menu, click Backup and Restore Games. 2  Choose Backup currently installed programs. 3  Then click Next. 4  Select the game(s) you want to backup. 5  Click Next. 6  Click on Browse to select the location you want to put backup.7  After selection, go Next. You can transfer your Steam games to your friends. 2  Your internet connection is too slow to download a same game again and again. 3  You need to format your hard drive or reinstall your OS. 4  Your game files get infected frequently by malware programs.