If you're using an SSD for this purpose, Docker storage, then the solution is easy. Don't include the SSD in the UnionFS drive group. Let it be an independent drive. Set up a share on the SSD, to store your Dockers and you're set.
If you're using a Docker as a downloader, set the location where files are to be saved, in a normal share (Videos for example) that uses the UnionFS mount point.
The ssd in not in the UnionFS pool.
Yes im using docker as a downloader. Thats the problem im having when I do that it does not show up. it writes the folders I have setup into the UnionFS pool shared folder. but thats it. Sonarr shows the drives in use but does not show the UnionFS pool shared folder. But if I change it to shared folder that is not apart of the pool it shows up.