To backup Prayaya V3 is vesy easy.

First, you could exit Prayaya V3.

Then copy all the folder of "PrayayaV3" to a safe place is OK.

You could copy from computer hard disk to USB device or from USB devide to computer hard disk.
(Note: The folder of "PrayayayV3" need to be copied to a root directory of the partition. For example:  X:/PrayayaV3/...)

Then when you want to run the bakcup version, just go to the "PrayayaV3" foler and run the "PrayayaV3.exe" file is OK.

Note: when you copy the "PrayayaV3" folder, all the programs and data files in V3 virtual system will also copied for backup together.