There’s SDS drop made by Void. Very intuitive(once you get the general gist of creating folders and selecting upload spots) after that it’s drag and drop(just not on the pads). Pretty quick upload times. Only 10 bucks.
The synth parameters are pretty versatile and you can, no doubt, do a lot with them; but if you invest the smallest amount of time going through the arduous task of getting samples into the machine then your sound potential increases exponentially. The samples sound GREAT layered, and you can make a lot of weird sounds with various features of the machine(ie lfo on the sample slot, create sound waves through the granular features of loop start/stop and even the scene/performance features where you can alternate between the synthesis and samples at the push of a pad!)
Highly worth the chore of loading up the machine! Hopefully they’ll implement a drag and drop option soonish, until then SRS drop all the way!
Good luck!
Edit: I fixed my information because I’m too vain to let my error ride, and included this addendum to ensure LyingDalai’s reply still makes sense. I apologize for the confusion, and I thank you for your cooperation