I have a 120GB SSD boot drive and a 1.5TB drive I use for storage and a 640GB drive I keep most of my programs on. I removed the 1.5TB storage drive and my computer comes up with a message that I need to select drive to boot to or insert bootable media. (something close to this at least). Once I put the 1.5TB storage drive back in it booted fine. I had already moved all of the data off the drive but noticed that 61GBs were still being used. I selected show system files from folder options and there is a Recycle folder and System Volume Information folder. I was guessing it was being used for restore points but I'm not sure if I understand why removing it would keep the system from booting. The System and Recovery partitions are on the SSD and are not located on the Storage drive that I tried to remove. I know that those would cause a problem if removed but I'm not seeing why the System Volume Information folder does. How can I remove this drive and still be able to boot?