Guys currently my mac unable to load into login screen, the progress startup bar takes forever. Repair using disk utilities also to no avail.

If I were to reinstall os in recovery mode, it won't erase my data and settings right?

Or anyone of u got solution for this issue?

Haven't really backup yet and not sure how to.

Will look for backup method too on the Internet.

If anyone of u might have encountered this issue too probably can give ur experience sharing and solution.