Which files should I delete in order to be able to boot up an external drive.

Hi,

I use my SSD external for everything. However, it doesn't boot. I've tried everything, a network recovery, disk utilities to safe mode. It will loop startup and finish with the error with 5 or 6 lines explaining why it crashed. If needed I will find what is says on-line.

I am grateful, because I have access to all of it's files as I set it up to share with another external and can get into it as needed. After disk utility and all the troubleshooting I did it appears that it's software related.

Trying to do this without investing in software, if possible. Are their files I can delete that will at least get me into safe mode? i.e. preferences or whatever.

Oh! After network recovery I get storage and something error but their is around a terrabyte left on the drive. Unless it's what the OS is alotted?

Any advice would be appreciated.

2017 intel Mac

OS Ventura on SSD drive- most current version.

Thanks