This is probably a very simple question, but I'm prepared to show my simplicity if it answers my query. I know I should have been syncing before, but I never bothered doing this until now. Thanks for your last answer, unfortunately, I think my E310 does have a hardware fault, therefore, I'm not sure how long my E310 will last. Because of the uncertain future working of the E310, first thing every morning, I sync the PDA to my PC using MS ACTIVESYNC, then, during the day, as I perform each item on the E310's calendar list (usually entered as "all day" events), I delete them from the PDA's memory. That is fine until the next day, when I run sync again, I get all the old events back again from the PC. Obviously, I'm entering/deleting my calendar events incorrectly. Could someone tell me how it should be done?