Help needed- online storage where my customers can upload files without seeing other customers files

Hi there

Hope you are all well and looking forward to the new year....i guess our friends in Australia aren't far off it now!

I have been looking for a solution for a business i am looking to start.

After a customer has placed an order i want to be able to direct them to a place online where....

- they can upload the necessary files i need from them (eg pictures)
- they don't have to sign up or have an account with
- they can't see other customer files
- low cost for me

Ideally i want to create a new folder for each customer, share that link with them for them to upload without seeing any other customer files.

Dropbox was so close i thought, but when sharing a folder it asks for them to sign up for a free account if they aren't already a member.

Although its not the end of the world as a solution, i want to make my customers lives as easy as possible. i.e Open email, click on the link and upload the files to that place and then i start work. No sign up, no confirmation needed....no messing around!

Does this facility exist and have i just not stumbled across it?

Does anyone know another angle i could take that i have not thought of.
I'll be very appreciative if someone can help.

Thanks and all the best for 2012

Tonio