If the data is below 50G in size and on my personal computer, then I just drop it into the Google Drive folder and it syncs to Google over night. When it is done, I export it and then send a link to the person(s). I pay $2 a month for the 100G account and I usually have about 50G disk space unused, so this is not an issue for me.

If it is above 50G and on my personal computer, I encrypt the data and then physically mail a USB stick with the data on it. Trying to arrange the downloading/uploading of 50G of data from my personal computer to another personal computer is a real pain. The people that I would send/receive that much data to/from, that is stored on my personal computer are usually people who don't know much about ftp, scp or easily sharing files over the Internet. Sending a USB stick is just so much easier and in many cases, faster. I make sure the recipients know how to decrypt the data before sending the data.

If it is on a server (For example, a side project instance in AWS), then I drop it into S3 bucket, export it and send the URL to the recipient. I just eat the cost of them downloading it. Usually I am making money off the work anyways, so it is the cost of doing business.