My file manager stopped when i open some music files in addition my walkman stopped also i thing that it is related to tha same problem my music files are on the sd card and i already format it and put my songs anather time nothing is changed
Try using File manager HD - I use this app and have no issues at all - You could also try using a cache cleaner or going in to Settings apps then all and then locate and open Walkman app and tap on Clear cache and data
I tried to use it before and i tried all file manager applications i have the same problem ... I clear cache and data it work only fo 5 minutes ... I just feel that my phone is crazy
Thank you for ur help it work now but i disabled my walkman and downloaded music application for android , plus i downloaded another file explorer because astro manager is not working correctly so i downloaded DUO files