yes .
Two ways
In SAMPLE EDIT When you have your slice selected, hold SHIFT and touch CONVERT on screen ... convert to a new sample, assign this sample to a pad on a program, tap this pad, then in MAIN pencil icon save current sample and choose the location and name... Then you can delete your unused long sample in SAMPLE EDIT mode or using the PURGE function.
Or : in SAMPLE EDIT, in TRIM mode ( not Chop mode) , seleect the slice number with the Jog, touch PROCESS, then EXTRACT to a new sample, and after do the same routine as above to save it on SD.
I usually name an empty program as the source file, and I save the program with the sample directly.