Can't transfer music to Meizu M6
 

I bought a Meizu M6 in February which has been working. It has almost reached it's 2gb capacity (says only 3.7 mb free) so I connected it to a PC and deleted some albums (about 50mb) using Explorer. I updated the library on the Meizu but when I reconnect it to my PC and click properties it still only shows 3.7 mb free and won't let me transfer music because there isn't room. When I click 'system info' on the player it also shows only 3.7mb free.

Is there anything I can do? Should I reformat the player?