Backing up player backpack inventory/configurations?

[pokemongojsb1]

Is there a way to do a backup of player's backpacks on my server?

For builds, I use WorldEdit to make a schematic of the players buildings. If a backpack is present, it comes out empty on the LOAD/RELOAD, so all items are lost.

Is there a way to back up the backpack data of a player?

[P3pp3rF1y]

Backpack contents are stored in sophisticatedbackpacks.dat so you would need to copy that to the new world.

[xylewis]

Does this file sophisticatedbackpacks.dat store all the backpack data in this A world? If it is directly copied to B world, will it overwrite the backpack data in B world?