rasidoor wrote: ha ha ha, im re-install on monday , from scratch
Timemachine , first
Then everything new
Time Machine by default will restore everything, in which case you'll end up in the same situation. It's OK to back up via Time Machine provided you restore in a highly selective fashion, such as only FCPX libraries, media files, documents, etc.
Another problem with a Time Machine backup is it's not verified. It's easily possible to back up to a hard drive, erase the machine, then when attempting a Time Machine restore, find the backup hard drive is defective or has file system damage.
You can run Disk Utility First Aid on the Time Machine drive after the backup, which at least checks the file system (but not the disk surface). Ideally you want two different types of backups, such as Time Machine and Carbon Copy Cloner. The Carbon Copy backup is verified.