Does your phone say modified when you take out the external sd card? You can simply unmount it shut down the phone and then remove it just to make see if maybe that is the issue. If it is whats causing the modified status then just backup whatever files you want to keep. And then format the card. You should be good to go
Sent from my GT-I9300 using xda premium
Ok, Status showed Modified. I unmounted SD card, took the card out while phone was turned on, Status didn't change. Then I rebooted without SD card and Status was Normal again. But this doesn't really tell me anything because the Status has changed from Modified to Normal when rebooting even when SD card has been installed.
Device Status just changes from Normal to Modified when the phone is running. Sometimes the phone can run hours with Status showing Normal and then suddenly when i check at some point it has changed to Modified for some reason.