I need to find a website offering free space for me to upload files, can u please recommend me ?
I use this program, WWW File Share
Seems to do just what you're asking. Basically, it creates a makeshift website where someone can connect to your IP and view files you have in an assigned directory. It does not need webspace, since the clients are just uploading the files.
Nice features include:
1) username/password protection
2) nearly-fully editable html
O wait, to upload files to? I don't know.
I'm not sure if Brinkster is still free anymore.
Tripod also works.
Separate names with a comma.