I have realized that the .thumbnails folder in internal sdcard can take up a lot of storage. Mine was as big as 2 GB. I would delete the folder but it would come back bigger after I take a picture with camera.
I have found a fix to stop the folder to continue creating itself after deleting. You need to go into your file explorer and make sure you have Show Thumbnails option on in your settings. Then go to your internal sdcard>DCIM and the .thumbnails folder will be located there. Delete the folder then press the "New" button, should be a plus sign, then press "New file" and name the file ".thumbnails". The folder will not recreate it self again because it thinks it's already there. Gallery will not create thumbnails for pictures anymore but just download Quickpic from the Play Store and it will take care of that: https://play.google.com/store/apps/details?id=com.alensw.PicFolder
Now enjoy your freed up storage space!
I have found a fix to stop the folder to continue creating itself after deleting. You need to go into your file explorer and make sure you have Show Thumbnails option on in your settings. Then go to your internal sdcard>DCIM and the .thumbnails folder will be located there. Delete the folder then press the "New" button, should be a plus sign, then press "New file" and name the file ".thumbnails". The folder will not recreate it self again because it thinks it's already there. Gallery will not create thumbnails for pictures anymore but just download Quickpic from the Play Store and it will take care of that: https://play.google.com/store/apps/details?id=com.alensw.PicFolder
Now enjoy your freed up storage space!