I have an external drive which I do my one care backups too. The backups I have done have nearly filled my external drive. I have two different folders with backup info. One folder was all written in Nov 2008. The other folder contains what I think are all of my backups, which to me it looks as if every backup has a new date. So now I am up to 117 folders all consisting of at least 2 GB of drive space on an 80 GB drive. Some folders are zipped. Can I delete some of the older dated backups without causing a problem?