Hi Richard, It depends on how sensitive the data you have on that drive is. If you have anything personal and sensitive which you would not wish others to see, you cannot simply format it and hope for the best. You would therefore need to obtain a special program which uses special techniques to completely obliterate the information. The following may seem like scare-mongering, but I assure you 100% that it is not. http://www.whitecanyon.com/deleted-files-let-10-2003.php George. From: access-uk@xxxxxxxxxxxxx [mailto:access-uk@xxxxxxxxxxxxx] On Behalf Of Richard Godfrey-McKay Sent: 21 April 2008 18:44 To: access-uk@xxxxxxxxxxxxx Subject: [access-uk] ANOTHER USB HARD DRIVE QUESTION Hi, I'm selling a USB hard drive, and need to ensure that all data is gone before I do so. Can delete what's there obviously, but wonder if a reformat would be the best thing to do. If so, what type of format? Thanks as usual for replies. Richard Godfrey-McKay Tel: (01738) 445 880 Mobile: (07791) 452 593 Please read this special message My partner, Cindy, is losing weight and at the same time, raising money for RNIB. Please go to www.justgiving.com/slimmercindy <http://www.justgiving.com/slimmercindy> to make a generous donation to RNIB and keep her healthy and motivated to lose even more weight.42Lb to date! Thanks for reading this message. Richard