If a USB drive (NTFS) is being mounted as read-only on my RasPi and my main PC, does this mean it's about to go puff? 
I'm copying all the stuff and I plan to reformat it as EXT4, but I'm not sure how much can I trust this thing anymore 
Replacement flash drive (finally) arrived. 
Since this will only ever be used in my RasPi, I wonder if I should try F2FS 
Connected to the PC and it Just Works(tm)
Put it back into the phone and it Just Stops Working (tm)