"When you say your's on upload,how am I uploading files and using my bandwidth if there on my PC,sorry if its a daft question."
Not a daft question at all, iqs. You have to remember that they aren't really connecting directly to your computer, you both connect to your ISP's servers, you upload the files (using bandwith to do so) to your ISP's server, the servers ISP'S connect and your relatives download (using bandwidth to do so) the files via their ISP's servers.
Thats a lot clearer now,thanks.It just shows where my weakness is in regards to IT. After my A+ is finished I believe a CISCO Network course/qualification is required.
Sorry just one more question please,the files I allow my relatives to download,can only the user with a password access them?. Why I ask,when I established a test connection,I could see the folders,but when accessed,a password was required.I probable answered this question by asking it,but clarification from an expert would reassure me .