178 Chapter 11 : TroubleshootingI copied files from my computer, but I can’t see or play them onmy phoneWhen you connect your phone to your computer in USB Drive mode, youcan copy any file onto your phone. However, each media application onyour phone—Photos, Music, and Videos—can display or play files in certainfile formats only. If your media file is in an unsupported format, you can’t useit on your phone.For a list of supported photo types, see Photos. For a list of supported musicfile types, see Music. For a list of supported video file types, see Videos.When I open the drive folder representing my phone from mycomputer, I see subfolders. Do I need to move my files intothese folders?The default folders are there to help you organize files you copy to and fromyour computer. But you can copy files from your computer into any folderyou want—you can create your own folders, or just drag your files to the toplevel of the drive. As long as the file is in a supported format, your phone candetect and open it.NOTE If you move a music file into the ringtones folder, the Music applicationcannot find it.Backing up and restoring dataI need to reset my phone but don’t understand the differencebetween a partial erase and a full eraseBoth a partial erase and a full erase delete all personal information, such asevents, contacts, and tasks, as well as applications you have added, such asthird-party software, on your phone. In addition, a full erase deletes all filesstored in the USB drive of your phone, which includes all pictures, videos,music files, documents, PDF files, and ringtones.For more information, see Erase data and reset your phone.How do I get my data back after a full or partial erase?After a full or a partial erase, on your phone, enter your existing Palm profileemail address, and password—don’t create a new one! When you do this, alldata that has been backed up to your profile—contacts, calendar events, andtasks, as well as apps you bought through App Catalog—is restored to yourphone. To restore information about your online accounts to your phone,simply enter the password for each account when prompted after theerase— synchronization begins again.A full erase deletes everything deleted by a partial erase, plus everything youstored in your phone's USB drive (photos, videos, music, documents, PDFfiles, ringtones, and so on). You need to have copies of those files availableelsewhere if you want to restore them to your phone. For example, you cansave copies on your computer and then transfer them back to your phone(see Copy files between your phone and your computer).My bookmarks were restored, but the thumbnail icon is notdisplayingWeb bookmarks are part of the data backed up to your Palm profile. After apartial or full erase, a bookmark is restored with a generic thumbnail icon.After you revisit the page for which you created the bookmark, a thumbnailicon is restored.