Many users run multiple Amazon accounts on one device like kindle, ipad, etc. But many of them have to log out one account then log in another when syncing/transferring/backing up files, which is really inconvenient. So a cloud manager is recommend here called MultCloud which can not only help you manage multiple Amazon accounts on one device but also transfer files among different cloud services without switching accounts such as backup OneDrive to Amazon. You only need to add cloud accounts into it then it’s ready for transmission. Most features are available in the contextmenu as well as in “Transfer” tab.
*Update: The latest version of MultCloud has more tabs, Cloud Transfer, Cloud Sync, Cloud Explorer, etc.