hi, Some users had such problem after they installed speech voice data: Android MediaPlay blocked in run time. Becasue Android MediaPlay scans the SD card automatically and finds all of the media files.

Solution:

Put one .nomedia file into the folder which you do not want to be scanned. You can create one txt file by using Notepad, as "Save As" one other format  type, without any postfix!

If you dont know how, just download there. It is zip file, please unzip it and get the .nomedia file.

nomedia.zip