Todey i connected my w810 several times with usb on my pc...
And now i can't even go to my games folder, it shows like it's empty, same problem with programs... Also in walkman some albums wont work that are working just fine is audio folder....

Any sugestion??

try to see if you can locate the files in your phone, try to check memry status if it still has alot of free space in phone memry and memry..if there still alot then there's something wrong with the usb.. if your pc is an old version try uninstalling then re install again the usb drivers. if you cannot locate the files in your phone, you have to reformat ur memry, if that won't work reformat phone memry and memry