File database?

accessible from a website which you enter with a password. CHECK!
The user should able to log on and upload files, or search and view files that were uploaded by other people (or by themselves.) CHECK!

Why must it be anything complicated?
Bob

not file specifically. My company uses FTP sites to go get software updates to the applications i support. But more suited for the comsumer are things like Microsoft Onedrive, Google Drive or Dropbox. These are the same as using your hard drive but the files are stored in the cloud. All of these use a password to get to your personal storage area. But what you can to is copy the file to this area and share the file. You can allow people to edit the file or just view it and not change it. You can share with multiple users (as many as you want). If the file is shared the person can login to the service with their own account and go to the a folder that will show all the files shared with your login account.