“Sounds” are settings files for the Machines, and might link to Samples.
Banks hold Sounds.
Samples are digital waveforms played by the sample layer on each track, possibly linked to by a Sound. Samples are stored outside of banks, in folders, on the +Drive.
You can use transfer to copy Sounds to Banks, and Samples to the +Drive.
Use the other panels in Transfer to copy the Samples you want to the +Drive. If you want them used as part of a Sound, make the Sound on the Rytm after you’ve copies the sample over. You can then save it in a Bank of your choice.
If you have a pre-made sound pack, which uses samples, you’ll need to ensure the folder structure on the Rytm matches the expected structure for the Sounds in the pack.