Hi @richjh,
A not ideal solution would be to disable backups in RapidWeaver’s publishing settings like so:
Make sure you have another backup solution in place for your project file though, like the ones contained in the below guides:
Backups - The definitive guide to backing up your RapidWeaver built website (part 1)
A better solution would be to warehouse your images and PDF files on your web hosting provider’s server (or another external server) and then just link to them from your RapidWeaver project file. This would cut down on your project file size which should make it more manageable.