1. Samsung 2. S5 3. KitKat 4. I deleted the Media Storage application data to fix a large .Thumbnails file and now the default Music application isn't saving my created playlists to a file in the Playlists folder. And my preferred low battery 3RD party camera application [HD Camera ULTRA] is taking ages to be responsive for taking pictures now. Clearing it's cache doesn't help. 5. Not rooted I noticed I had a superfluously huge .thumbnails file in my internal DCIM folder. It claimed to be taking-up 6GB, I know it wasn't really but it was around 600MB. I would delete and it would reappear. Now I have a 16GB device so every little space is key. I looked online for similar problems and it was suggested I delete my Media Storage and rebuild it. I did so and things were running much smoother and the .Thumbnail file stuck around 300MB. But I went to remake some playlists and noticed that they weren't saving to the Playlists folder (I didn't back them up originally because they are basically just of folders). They were working fine in Music, but nothing added to the internal storage folder. I searched with ES and My Files and see that an empty file is created for a playlist, but it's not a playlist file and claims to be created in 1969. I tried deleting the Music data but no dice. Also I use a 3RD party camera application when my battery is low and it is taking several minutes to become able to take pictures now when opened. It seems to be able to take front facing pictures faster but will give a "you need to insert a SD card" type error if I try to take a front facing picture before it is ready (another 3RD party camera application gives a "failed to save" error if it isn't ready). If I select it as the camera to use for an application (like to take Swarm picture) and loading it has done is reset. I have tried the application Media Re Scan several times to reload my Media Storage and it seemed to work for a day for the camera application even opening it with an application but today it's back to taking awhile. I tried redeleting the Media Storage and leaving it a few hours to rebuild naturally instead of via Media Re Scan but it hasn't fixed me issues. It also didn't delete my custom ringtone contact settings this time either. I powered off the device after deleting the Media Storage application data the 2ND time and removed the battery for awhile to make sure it was fully powered down and then merely turned the device on and left it for hours. I would like to fix this without a factory reset because I have no idea how to back-up the Bookmarks and such in the default Samsung Browser. I've cleared the data before and the Samsung Account sync did nothing despite claiming to be backing them up daily. And my custom suggestive text is horrible to rebuild. Also I worry about my S Health data. I also have 2 years left on my warranty so rooting isn't an option, especially since I play "The Battle Cats". Thank-you if you can help!