I have several cloud services, all of which I want to be able to access easily. I finally came to the solution of an FTP server.
The cloud services that I use are
I would like to create an FTP server that basically stores and synchronizes file metadata with the cloud providers listed above, e.g. Folder "GDrive" has the file metadata synchronized with my Google drive account, but the files aren't actually stored on the server. (This is what OneDrive used to do before the update)
When the client requests something, e.g. "GDrive/abc.txt", the FTP server downloads the file from google drive and then sends it to the client. This way, the only thing taking up storage on the ftp server is the metadata for all of my files.
Is this possible for any/all of the above cloud services?