TitanFile is a great way to share large files with someone, especially for Document Migration. Here is a step-by-step process for logging in to TitanFile and Uploading Documents.
Step 1: Get an Email from TitanFile and Click Access Channel
Step 2: Create a Password and Choose Proceed to messages
Step 3: Click Attach Files
Step 4: Choose what to upload
If you have a large amount of Documents, you should Zip them before uploading them: https://optiable.com/how-to-use-7-zip-to-compress-files/