You don’t need to resample them.
Put the Octatrack into USB mode [Function] + [Mixer] -> [System] -> [USB Mode] and the Octatrack will appear as an external drive on your computer.
Then copy your samples over into the \Set\AUDIO folder
This is the Audio Pool, Samples in here are available to all Projects in your set.
Eject the Octatrack as per any other external drive.
Double click [Playback] on an Audio Track using a Static or Flex machine, then you can browse the samples in the Audio Pool (Use the [Arrow] keys and [Yes]/[No] to navigate/select)
Once you’ve added a sample into the Project, it will be available on any Bank / Track.
OctaEdit : A Software Editor and Librarian for the Elektron Octatrack DPS-1.
Disclosure: I’m the developer of OctaEdit.