Video not uploded in the good server

Hi! My vshare site run in 2.6 version and use 3 servers. But since yesterday, i have a big problem : when a video is uploaded, it is sent in the second server (which is already full) instead of the third one. The third server has a lot of free space.
How to resolve this problem?

Another question : Is it possible to move some video stocked in my first server towards the third one, to relieve it and have more free space?
Thanks for your help.

Disable server that is full in admin area. This will stop uploading videos to that server.

Moving video from one server to another can only done manually. Move FLV file to another server, then update video_server_id in video table. This can be automated with some command line php scripts.

ok thanks for the reply. it work now!
Thanks.