Files Read-Only

Hi All,

I'm having problems with my father's USB stick. I carried out a few updates for him yesterday, bringing everything up to date (App's Suite menu, Firefox, Thunderbird & Open Office). I then started Firefox to check his add-ons and update them when I hit a problem.

Foxmarks is refusing to update to Xmarks for me, and I've discovered that all the files and folders on the stick are marked "Read-Only". I've tried going to properties and unchecking the flag but it's just being ignored.

Can anyone give me some pointers. Thanks.

Oh I've tried unmounting and remounting but has no effect.