Same here.. My Device is Lumia 730, I've had this phone for almost a year now, few months back I started having storage problems like yours. My Phone's Storage is 8GB, My Apps+Games are 2.72GB (I Have no Games), Email+Messaging 291MB, Maps 133MB, System Files 6.16GB, and other small files totaling 50MB.. if you add all that up totals to more than 8GB... current free storage on my phone is ranging from 120MB - 70mb.....This isn't right
Why are my System Files so BIG?? I've checked other Lumia Phones my friends are using, their system files ranging from 2GB to 3GB.. so what is wrong with my phone???
Can someone help me... this problem is interfering with my phones performance.... can someone please help???