I have also had many issues with sync process and lost some long term worlds or they have become corrupted. After a complete re-install of Minecraft (by this stage I had nothing more to lose) I still get the "cant upload world.." error.
VicAcid
I have also had many issues with sync process and lost some long term worlds or they have become corrupted. After a complete re-install of Minecraft (by this stage I had nothing more to lose) I still get the "cant upload world.." error.