When email attachments won't cut it
Most email providers cap attachments at a fairly small size, so once a video, a batch of high-resolution photos, or a design file goes past that limit, attaching it directly just isn't an option. A file-transfer service sidesteps the limit entirely by uploading the file once and handing out a link instead of an attachment.
Email mode vs. link mode
Most of these services offer two ways to send a file: enter the recipient's email address and let the service deliver the download link directly, or generate a shareable link yourself and paste it into a chat app, a text message, or anywhere else. Link mode is handy when the recipient's email address isn't on hand, or when you'd rather send the file through a messaging app instead.
Frequently Asked Questions
Is there a size limit on the free plan?
Yes -- free plans typically cap the size of a single transfer, and a paid tier raises that limit substantially, so check the current limit on the service you're using if your file is very large.
How will I know the recipient downloaded the file?
Many transfer services send the sender a notification email once the recipient opens the download link, so you can confirm the file actually arrived without having to ask.