No idea what the maximum is or if there is a maximum at all except the 1gb.
A good approach to take with the drive is to only add the most useful samples and not just complete batches. Because eventually you’ll run out of space and have to clean up mess you’ll never use.
The way I do this is by making a selection of a selection. So first o go through a bunch of samples quickly and make a first favorite selection (copy to new folder). Then I make a more thorough selection of that selection. That way you’re left with just useful samples. Drag those in a near folder structure to easily find them and viola.
This will also speed up the workflow on the DT as you won’t be searching as much. So do the work once before and save time after again and again.
My 2 cents 
Ps. And indeed sample chains! :). Will save sample slots in a project. 
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