Is there a possible way tolike remove some files but link them from like a guthub? as not to use as much space. So if i remove some scripts/models and put them in github or something could i link github to playcanvas to be able to use the models and scripts but not use as much storage?
Yes, you can load assets from external storage such as Amazon S3 and GitHub or even just a standard webhost (as long as the CORS has been setup correctly).
See: Load 3D models at run time from a PlayCanvas application