Access files on Server HDD

Hi, I have the latest version of the seafile server on a raspberry pi 2 b on my local network.
The files are stored on an external USB HDD. I would like to access the files when i just plug the usb HDD to another computer. is there a way to store the files completly unchanged like normal folders on the server backend?

No such tools yet.

You can use the seaf-fsck to export all the files. But it is for disaster recovery if the existing system is broken.