Hi all. I've spent almost the full 2 days looking for solution of this but to no avail. I owned the SM-T2105 Galaxy Tab Kids rooted. Then suddenly I was thinking to move all my apps to SD card. Trying and trying, finally I realized that I need to make separate partitions on the SD card first. So I one of the solutions I found on the internet told me to make that partition using the PC. Then I am interested to connect my device as mass storage instead of the default MTP connection. So I found this - https://play.google.com/store/apps/details?id=com.mohammadag.samsungusbmassstorageenabler&hl=en. Without reading any further, I quickly installed it and turn on the mass storage function. But to no avail. My PC can't recognized the tablet anymore since then. Immediately, I quickly uninstalled that app and looking for another app. But still the same problem. So finally I am stucked with "connected as an installer" whenever I connect the tablet to my PC. And the worst thing that, I cannot change it back to MTP/Camera transfer mode. I was totally intensed since then. After trying and trying, I still cannot find the solution. Then I thought a firmware upgrade will do. So i install the latest firmware for SM-T2105 - T2105ZHAND2 from here - http://www.sammobile.com/firmwares/download/32189/T2105ZHAND2_T2105ZZHAND2_TGY.zip/. I also rooted it again then. But still the problem persist. I also end up using the ADB terminal from my PC to issue the Code: su setprop persist.sys.usb.config mtp,adb reboot But still the same problem. My device would restart immediately after issuing the command. I also find out that this particular entry does not exist in my device Code: /sys/devices/platform/musb_hdrc/gadget/gadget-lun0/file So I am really stressed with this. Can someone here please help me out? Factory reset would be my kast choice. Thank you.