Hello there,
I´ve been having trouble, that my cards won`t synchronize over OneDrive anymore. The cards on my PC are more than on other devices. So I thought: "well, let`s uninstall the App, maybe that will help". Nope, it didn`t :-D Meanwhile my App on my iOS-Smartphone won`t download the actual file from OneDrive anymore. Although the message says: "Download successful", I don´t see my cards anymore on my Smartphone. I will not try this on my PC since there are over 21 thousand cards listed... Is there a problem with the last minor patch? I tried the F12 already on my PC. Help me please :-)
this is more likely to be on onedrive side
First make sure to save your collection from your PC
Then can you try with dropbox?