Format Error I don't know what I did to my player, but it comes up as FORMAT ERROR when I try to turn it on. What can I do to fix this?

You will need to format the mp3 player.
Open
Control panel
Then administrative tools
Then Computer management
In the left column click disk management, right click on the pen drive and format it.
Be sure you format it with: FAT FILE SYSTEM.

ok
try this
cheers

i dont now either if u find out will you let me now thanks jodiestar1@live .ca

boot error

i can.t listen when i turn on my mp3 inmediatelly turn off i don.t what to do

Try to plug it in another computer and format it and download the firmware over there too, it works.
Good luck.

There are two ways to format an Mp3 player - one on the computer itself, and one in Windows Media Player. Both methods will end up erasing all the songs on the player, but the player will be "good as new" after that. Sometimes reformatting in this manner will override the player's native formatting and cause problems - this can be reversed in most cases by updating the player's firmware. Firmware upgrades are available from most manufacturers' websites.

WARNING: The following procedures will erase all songs on the player.

Check if the file system is NTFS. If yes, format it to FAT or FAT32. - Connect player to computer, double-click my computer, right click on icon of mp3 player and select format. This only applies to Windows-based computers.
You can also format the player in Windows Media Player itself:
Connect your Mp3 player to the computer and open Windows Media Player. Click on the Sync tab. Pull down the drop down menu underneath the Sync tab by moving your cursor over the Sync tab and left clicking on the little black arrow underneath the Sync tab. Highlight "name of Mp3 player here 1GB" (wording may vary slightly), and then select "Format." - this should erase everything.
-Tha Mp3 Doctor

Well according to what is says you need to update the mp3 player so connect it to the computer and when you brought the mp3 player it should have come with some software, if it's installed good, no go into the software look for somewhere where it will say up date or something.

If this didn't work or no software was provided visit this site i've checked on here and it has your mp3 player drivers.

http://www.sandisk.com/driverdownload/index.asp

If you were still unsucessful the my final solution would be to connect it to your computer and format your mp3 player by going to "Start" - "My Computer" - Look for your mp3 player on there prefrably called "Removable Disk" once you've found it Right-click, then click on "Format". Once format is complete hopefully the problem will have been fixed.

Good luck. Hope my solution was helpful

Change them to mp3 format

With your mp3 player not playing any music, press and hold Search/Menu until the menu comes up (1-2 seconds). Scroll to the last chioce, which is Advanced Menu. Press your Play button to select it, select Format, select OK, and your mp3 player will be formatted. This WILL erase all of the music that you have on there, but reload it all with SonicStage, and you should be good to go.

There's a file here that should solve it - http://www.acer.com.hk/english/services/download/driver.php?model=MF350 Good luck