Moving downloaded apps on LGMS500
Not all apps can be moved to the SD card using the native method.

You need to partition the SD card and set both partitions as primary. The one you want to set for apps storage needs to be ext4 formatted and the other FAT32. Remember that partitioning will wipe all data! 

Now Link2SD will be able to "Create link" and move the dalvik cache, internal data (pro version), library and application for to SD card.