I am using Lumia 535. Whenever I try to copy any movie file from my computer to the phone, the copying gets hanged. Then, if I check my phone, it says Low Storage, besides having loads of memory. Yesterday, I tried again after updating, copying got completed, but after that when I tried deleting my cache memory using the app, the same problem occurred again. It always needs restart and then scanning of SD card. Please suggest something.
If it's showing 99% full, then delete some stuff to free some space up; you can tap on the space used bar to show a break down of where the space is being used, most options then have another level that you can drill into to manage apps/files as required.