Saves copy is easy. On not hacked console, just export them to USB (FAT32 or exFAT on MBR or GPT) from PS4DM (but they need the same NP Account ID for restore and console activation). On hacked, export them in decrypted form via Apollo (so they will be free from any DRM type came from OrbisOS; however it is possible that some developers locking save in additional way on their own (never heard of such case on PS4, but technically it is possible)).
In case of trophies, no way to copy them in independent form yet. So You can backup only containers which can be restored only on this console, only on this specific user with this specific NP Account ID. Do not mislead trophy sets installed by games, and with cached one.
I don't have hacked PS4, so I don't know the paths.
Worth to mention is backup of EAP Key to be able read HDD on PC in case of console die or data recovery from dying HDD if console for some reason reject it.