I'm a newbie to TI so please bare with me. I recently upgraded from TI 9 to TI 10. I use an external USB hard drive for my TI backup files. I have a full system backup that is scheduled for weekly Differential backups. I also have a backup of Documents and Settings that has daily Differntial backups at shutdown. I noticed that I now have a list of backups numbered (2) through (6) under the original Docs and Settings backup. Question: For example, if restoration of Docs and Settings only requires the original and latest Differential backups, is it safe to delete (in my case) Differential backups (2) though (5) keeping just the original and no (6)?