I need to upload a large about 612 MB Zip folder for others downloading. Can you recommend a reliable online storage for uploading at least 1 GB file and allow downloading WITHOUT sign up? Thank you for your answer.

I haven't head of any... particularly any place that allows files that large. However I'm curious if someone does know of a place.

Your ISP may be giving you space and you are already signed up.

Many sites give you free space, so why the problem with signing up?

Doesn't really make sense. If you don't sign up with a website, even if its free... how are you going to login?

If you don't login, your then sharing all your data with everyone else. Doesn't really make sense. You have to sign up somewhere otherwise you can't login to the website to access your "secure" space... if you're not logging into SSL/HTTPS then its not secure.

buy some storage space from a site like Your Domain Studio for $10 a month or so and use FTP to upload your files, then give people the www address where they can access the file.

Are you afraid of being run after by authorities?