Dear all, I have PC with Windows 8.1 Ent., 32-bit, and Saphir Media Tablet with http://i.imgur.com/vEShkO5.jpg and Apps installed http://i.imgur.com/D8zyydM.jpg. Tab specs: Dual Core 1.6 GHz, 1GB, 16 GB internal memory, 3G. Either MTP or PTP I cannot share files between PC and tab via USB, while Bluetooth is working fine. 1- When I connect PC and Tab via USB cable by selecting this option in android http://i.imgur.com/IXpPbM1.jpg, windows shows this http://i.imgur.com/UWWiiys.jpg, http://i.imgur.com/SX6dx45.jpg and http://i.imgur.com/qtxLE8L.jpg. When I refresh here then it shows the files http://i.imgur.com/0WobMK8.jpg. But files in these folders cannot be access http://i.imgur.com/r1vSB82.jpg, and cannot be copy http://i.imgur.com/sNh2jd8.jpg. 2- By selecting this option in android http://i.imgur.com/3mgepyj.jpg windows shows this http://i.imgur.com/fzde1ve.jpg, http://i.imgur.com/IPgrd7E.jpg and by refreshing http://i.imgur.com/NUcwMGR.jpg. Kindly help.