FileMaker Pro - Re-Link Reference Root File-Path - MacOS

Hello, I designed a Filemaker pro media database a number of years ago. The records in the database connected to a few specific folders—ie "ROOT_HDD/MUSIC"—all positioned directly in the 'root' directory of my local hard-drive. By updating my OS from Mojave to BigSur, the root directory has been made inaccessible by Apple. They did this for security reasons. In the process, they moved everything which was once in the root directory into a subsection as follows: "ROOT_HDD/System/Volumes/"ROOT_HDD/MUSIC." As such, all of my references are broken. I would like to Re-link these files to the Filemaker Records as efficiently as possible. I would like to do a screen share with you, so you can walk me through it. Also, as it may be relevant, I once hired some custom code to enable platform independent file finding via Troi plugin. I wanted to be able to push a button and reveal the file either Windows OR MacOS Finder. It worked, but not since updating my OS. I don't really care about Windows anymore, but the script may be integral to fixing this issue, so I will attach a screenshot to this project posting. There is more I would like to eventually do with the database. Being able to quickly switch between local and cloud volumes of the same media files for 1. Experience with App development a bonus. Look forward to working with you!! - Christian