Unrecognized file type error when transferring .avi files from memory card to computer

SOURCE: 2GB microSD card

Try different formats when formatting it on the computer. There will be FAT, FAT16 (maybe) and FAT32.

SOURCE: Transferring music files to microSD card

It says on the manual this this phone accepts microSD™
memory cards up to 2 GB (depending on memory
card manufacturer and type). Check with your phone manufacturer if there are known issues with a particular memory card brand.

Also, try connecting the memory card to your computer via memory card reader and see if the card will be detected. That way, you can check whether the card is working or not. Save the music files from the PC to the memory card, then see if the music files will appear when you insert the card to your phone.

SOURCE: i cant delete,format and transfer the files to and from the card

What type of card you are using? If you are using an SD card, make sure that it's not locked. You may want to try using different card reader or different computer.

You may try formatting the card under the Disk Management. To do this, please follow the steps below:

1. Right-click 'My Computer' (for Win XP) or 'Computer' icon (for Vista).
2. Select 'Manage'.
3. Locate and open the 'Disk Management'.
4.Connect the card and check if the drive letter for the card will appear.
5. You may right-click on the drive letter and format it.

If you get the same problem, then probably, the card already quit working.

SOURCE: I have just purchased 2 Sandisk 2GB SD Cards for

Try formatting the card. It may have some bad memory sectors that can be cured by a good format.

SOURCE: problem with sandisk microsd card 2gb

try to check the your gadget.does your gadget support mp3 files?if that is an I Pod then you will not able to view the files because ipod is different format.install the software of your gadget to your pc and convert the file to which format your gadget supports..tnx

hope i help you
pls rate my help