Our application is accepting file uploads before sending them to S3. How much disk space do our containers have access to so we don’t end up running out?
All of the containers on a given host share a 100 GB disk so if your application is only working with a few GB of files at a time (< 5 GB) then you should be fine.
You can bypass uploading the file to your application by providing the client with a presigned URL that they can use to upload directly to S3. This is especially useful when working with large files. The same can be done to allow clients to download files directly from S3. See the File Uploads documentation for additional details.