There's no size limit for files uploaded to the file manager tool except for video files. Video files can be a maximum of 2 GB, and all video files uploaded to your file manager tool will be transcoded to stream at 2.5Mb per second by default. For faster video streaming, ensure you are using HubSpot Video, powered by Vidyard.
Please note: when uploading a file larger than 1 GB, you may experience slowness during the upload process, or even upload failure. For this reason, it's recommended that you keep your files to 1 GB or less.
To see the file size of your uploaded video:
In your HubSpot account, navigate to Marketing > Files and Templates > Files.
Click on the video file in the file manager dashboard.
The details pane on the right will show you the file size of your video. Any videos over 2.5Mb per second will have a link below the file size information which you can click to download the original file.