When dealing with large files or when uploading and downloading multiple files at once, optimizing upload/download speeds can vary depending on device and internet speeds.

Here are some tips to optimize uploading and downloading if you're having any issues:

To optimize upload speeds - larger files do take longer to upload, so if you're uploading in bulk, you may see faster results uploading in smaller chunks. Note that the maximum file size for any single file is 5GB. Uploading and Boombox sync for macOS do have the same single file limitation.

When uploading multiple files (under 5GB) upload should not be impacted, but may take some time to process.

To optimize download speeds - if you experience issues with your download not working properly, aim to download in chunks of 500MB or less for best results.