I have been trying to do an incremental backup but keep getting an error that says disk is full. I have a 500 gb hard drive which I allocated 100gb for the Acronis secure zone. I am only using about 30 gb of my C drive. I just increased the size of my secure zone to 120 gb and the backup worked fine. Am I going to have to keep increasing the secure zone? System specs vista home premium, 500gb hard drive, amdx2 5200, 2gb ram. Acronis True Image Home build 8053 Each backup seems to be about 30 gb even though I choose incremental backup. I add very little to my hard drive, no movies etc. so I don't understand the backups being so large. Also, if I try using Try annd decide feature, I get a message that the try and decide drivers are missing. I have redownloaded and reinstalled numerous times to no avail. Any ideas where I'm going wrong would be appreciated.