Hi! I'm in big trouble. Bought a new MP3/4 player in Thailand couple days ago, A&V MP-17, productor; Wilson Co. Ltd, version; 9.0.48, 1gb. Back at home I noticed that available memory space is only 3.96 mb and used memory space is 958 mb. The problem is that I can't find out any files on player, after delete demo songs and some pictures the player is empty. If I format the player do I still have firmware on the player? If not where can I download a new firmware. I couldn't find any information in user manual.

If you format it you will still have the firmware on it. Anyway, it sounds like a bad partition or a borked flash.

Back up any hidden files on the player and then use SwissKnife to delete the partition, then recreate and reformat it, and if it's the same after formatting then the flash memory is broken and you will have to get a replacement.