Some smaller businesses may have a huge data store, but not the money to pay for a business grade internet connection to upload it in a reasonable amount of time. I've worked for clients who have a 10 megabit full duplex fiber connection for over $1,000 a month (probably because of low ISP competition and because they were in a newly built, low density area). If they were working on migrating to the cloud, they would certainly consider taking a few hard drives one time to AWS rather than maxing their 10 MB full duplex connection for weeks or months.