I recently purchased a new Droid Turbo 2 phone this year to replace my galaxy 5 . I used a 128 gb sd memory card with my galaxy for mostly music. When I tried to switch over I had to reformat the sd card to work with my Turbo. I was able complete the process of copying data to laptop -> reformatting sd card (it gives you the option to format as portable vs internal storage, i chose storage which i am guessing now was my first mistake) -> copying back to sd card with no problem. Today, I absent-mindedly tried to switch my sd card to my less cumbersome mp3 player so I could listen to my music while I ran( something I did regularly with my galaxy). Obviously, it didn't work (due to the conversion process) so I figured I would put it back in the droid and just copy maybe an hour or two worth of music to one of my smaller sd cards. When I tried to reinsert the 128 gb card in the turbo it said the card was corrupted. I have tried fix it using my laptop but it just gives me the option to reformat and doesn't recognize any data being present at all. I tried using chkdisk but as I stated before it doesn't recognize it as being a usable drive. I numerous pictures, videos, and literally a library of music on this card if anyone knows anything that could help please let me know.