I reinstalled mediacms on a server, how to refresh videos on website that were saved on another disk?

[gniyliu]

Hi,
I installed mediacms on the server, and mount a disk on ~/mediacms/media_files.
Then I uploaded some videos to the website, and I saw the videos saved on the disk.
Someday, I want to change the server, or the server is unavailable, so I must reinstall mediacms on the server,
And then I want to use the videos that i had saved on the disk, how to refresh media files on website?