The dock alone provides no extra memory. You can insert an SD card into it, or USB thumb drives, in which case there will be "memory" but it will not be system memory. I mean that you will not have programs running from or program information stored to, the removable memory. You can store documents, multimedia, or whatever else you want there but you have to put it there specifically. The T'Former will not do it automatically.
Swap your keyboard dock as you'd like. You should have no issues at all.