16 GB USB 2 MEMORY STICK I cannot format the pendrive. 2)when i double click on the removable disk,it says ''Please insert a disk into Drive E :'' 3)i used a pendrive format utility but the problem persists again. 4)i tried to format it using gnome also inserted memory stick which had films and info on which opened ok yesterday , today i am getting message please insert disc , tried formatting unable to, tried auto fix unable to purchased two memory sticks of ebay both worked perfect for one day both had 16 gb memory properties now says disc is empty . i own two other memory sticks they still work perfect please help

I'm a little confused as you mention both Drive E. which suggests Windows and gnome which suggest linux.

WARNING: Formatting the disk will erase any data on it. Do not format the disk if you are trying to get the data off it that was on it yesterday.

It is possible that the partition table has been corrupted.

If you are using windows. You can either try right clicking on the drive (not double clicking) from Windows Explorer (My Computer) and clicking format. Choose the file system type and go. Alternatively, you could work through the disk management administrative tool. Right Click on My Computer -> Manage -> Disk Management. Right click on the volume and format it.

If you are using linux, see if you have a valid partition table using fdisk for the device. Then, after creating the partition, use mkdosfs to format the drive. If you have formatted the drive as a linux partition, such as ext2, ext3, or reiserfs, it is likely that Windows will not see it as a valid drive.