Save Nirvana

Recorded Sample from Phono1 Input, set Start &End-point with the Faders & Display; would help to get it played it in Loop while working with the start and endpoint - is that possible?
Would like to truncate unused parts.
Gave Name to the Sample pressed shift & Save.
For very short time “save” or “saving” is appearing on screen.
Gave a Name to the Project again pressed shift & Save.
For very short time “save” or “saving” is appearing on screen.
After powering on the S2400 next day I can not find the Project on the SD-Card nor the Sample - it went to Nirvana? Does it in some circumstances save to flash and there is a special routine needed to save on SD-Card? Thank you!