MacOS Recovery deleted all my personal files

Raysalmarark wrote:

I own a 2017 MacBook Pro and attempted to upgrade to Ventura, which proved unsuccessful. Subsequently, I tried upgrading to Monterey, only to encounter another failure. Following the steps outlined in the article below, I initiated MacOS recovery. During this process, the system restarted and downloaded Big Sur. However, upon completion, I discovered that all my files had been deleted, prompting me to create a new user account.

Please help

How to reinstall macOS – Apple Support (UK)

You restore your user data from backup.

I would trust you have more than one(?)

If you value your user data

3-2-1 Backup Strategy: three copies of your data, two different methods, and one offsite.

More than one device, more than one backup methodology.

Time Machine is one of the easiest when it works as expected:

Restore your Mac from a backup - Apple Support