The ease of use, speed of transfer and the ability to send files over a wide range of file types. It's simple to set up your account and even easier to use once you've got it set up! I'm not sure how well it works in terms of sending large files (over 100mb) but I have found that smaller files work really well. I haven't had any problems with filemail as of yet so I can't comment on anything that has been an issue. We are using this service to upload photos for our customers so they can access them from their phone or computer easily.
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