Hi, I'm obviously a Final Cut Pro novice which is why I'm asking for help. I've been working on a huge video and lately, I've been noticing that the project has been crashing a lot more frequently than usual. I noticed that I have been running out of space. I took a look at my backup project files and noticed that there are a few over the last several hours but at least 3 of them are nearly 200GB in size?!. I need that space to carry on working but I'm unsure if it is even safe to delete any of these files and I'm terrified of losing any of my progress as it is nearly finished. What do these huge backup files contain compared to say the ones that are around 3gb in size? Is it render information? is it the actual clips themselves? surely the clips are stored separately in the folder that I put them in originally? Would I be okay to delete an older backup file (One of the huge 200gb ones) or will this mess up the latest version of the project? Any advice is much appreciated I'm super scared of losing anything I've done so far. Any help is much appreciated. Many Thanks - J https://ibb.co/s1vmkXb

Hi - I'm primarily an audio guy, but AFAICT the general consensus seems to be that render files would be the most likely culprit, as you guessed. This Apple support page discusses how to address that, if that is what's causing the large files in your case.. https://support.apple.com/guide/final-cut-pro/manage-render-files-ver68a8c250/10.4.9/mac/10.14.6 However, if you're in the middle of a project I'd be very wary of deleting anything -- if you decide to follow the Apple support page recommendations make sure you have a complete and thorough backup of the entire project, just in case you delete anything you shouldn't. And take note -- there seem to be two different versions of that support document, one for FCPX 10.4.9 and a different one for 10.4.7. I've also linked this thread to one of our FCPX courses [above] -- maybe a regular FCP user/guru will offer suggestions or guidance..