I have a LGMS500 (never again), I have used Link2SD and Advanced SD Card manager and have moved as many apps as I can to SD card and this was not many. Any other app I try to move to SD card I receive the following "Could not obtain root access" "Allow or Grant to superuser". OK, newbe here when it comes to android, how do I obtain root access? While understanding this term as a former programmer, I have absolutely no glimmer on how to do this with Android.
It is slightly different for every device, I'd recommend seeing if there are any threads specific to your device and how to root it at forum.xda-developers.com be careful to follow all steps correctly to avoid bricking your device.
For an older version (<=4.3) try towelroot ( towelroot.com ) press logo get an apk, it's safe to use, so don't worry if your browser tells you it's malicious.
If it fails, look for other method for your phone model. There are thousands of manuals for that already.