The "other" files are flooding half of the disk, letting only 6gb disc free

Please read See used and available storage space on your Mac - Apple Support. Pay particular attention to the description of System Data.

You may find neuroanatomist's User Tip helpful: What is "Other" storage on a Mac, and how can I clean it out? - Apple Community.

• What Apple used to label "Other" is now labeled "System Data".

The 'Other' storage on a Mac consists of different types of files that don't fall into any particular storage category (like videos, photos, music, apps, or mail). The ‘Other’ category also includes junk files and personal files such as .pdf, .psd, .doc, browser caches, voice files, message media files stored locally, system caches, archive files like .zip and .dmg disk images, fonts, extensions, app plugins, etc. Other storage spaces on Mac is something to be taken care of since an increased 'Other' storage reduces the available free spaces on the Mac hard drive.

Further, I suggest you to check the below link that will take you through the methods to clear the 'other' storage on your Mac:

https://mackeeper.com/blog/what-is-other-on-mac-storage-and-how-to-clean-it/

Hope it helps!