Each instance of Malcolm! initially comes with a 0.5GB allocation of file storage space.
Because a web bowser will download all content on a page it's good practice (for page loading speed and also SEO purposes) to try and keep each image on your page under 2MB and not include too many images on any one page. Squarespace have a good general guide here.
Video files should not be uploaded to Malcolm! - instead use YouTube or Vimeo and embed your content - see here for more info.. This offers a much better experience for your users (they get a device/speed appropriate stream) and your page download speed will not be compromised.
If you wish to make large documents available for download consider using a dedicated file hosting service (eg Dropbox, Google Drive, WeTransfer etc) and linking to that from your FAQs. This is better user experience because your user will be made aware of the file size before starting the download.
Remember in particular your mobile users who may be viewing your content via significantly slower connections!
If you do find yourself nearing the limit of your initial allocation contact us to request a higher allocation and we can provision this for you - there is no extra charge for this.