sansa e260 hangs up

[sasquatch]

I installed rockbox some time ago and it worked well, but one day I was turning it off and it hanged up. I held the power button until it powered off, and now everytime I try to access anything in the flash memory (song list, plugins, etc) it hangs up.

If I boot into the original firmware I can play songs but it only shows me the songs that I had before installing rockbox, even the ones that I deleted.

If I conect it to my pc (on windows or linux, on original firmware mass mode or rockbox) it seems to be fine until I mount it or try to access its folder, it makes the explorer hang up until I disconnect the player. When rockbox utility tries to mount it it also hangs.

If I connect it to windows on MTP mode, it works fine, I can view all folders and files, I can write and delete, but it doesn't show the changes in the original firmware and rockbox keeps hanging up.
Something that I noticed is that there are some strange files in the music folder, all of them have a 1 char name, some have no name, and they all have between 7.5 and 8 kb size. I tried moving or deleting those files but it does nothing.

What can I do to fix it? connect it in mtp mode and reinstalling the original firmware would work?
help me, please
thanks

[Chronon]

It sounds like the file system is damaged.  Try connecting in MSC mode and running a file system checking utility (like chkdsk on Windows).

[sasquatch]

the problem is that I can't mount it in MSC mode, only in MTP
is there a way to reinstall the firmware or format and restore everything in MTP mode?

[gevaerts]

You don't have to mount a filesystem in order to check it

[sasquatch]

error checking didn't work

I fixed it by deleting all the songs in mtp mode, there were some folders that didn't let me delete, but deleting the parent folder worked. After that I could connect it in msc mode, but it showed that space was half full, so I formated it, and now it works fine.

[Chronon]

Formatting should eliminate errors in the file system too.