Hi Joan, I would probably use one of two options: 1) A large file email service. MailBigFile.com has a free service for up to 2GB which can be used commercially. You can upload and protect the files, they get loaded onto a server and the recipient is emailed to allow them to download. You get email confirmations throughout, so when the upload finishes, when the recipient starts the download, and when the recipient completes the download. There are other similar services available, but that is the one I tend to use. There is a pro version for £19 per year that lets you send bigger files and leave the files on the server for longer etc. 2) Log in remotely with TeamViewer and depending on file size either copy and paste directly into the machine or use the built in File Transfer functionality. There is a free version but it is limited to non-commercial usage and you would need it on both machines, but the user can install into memory for a one-off and allow you to have access. They cannot deny receiving it if you put it directly onto their machine! I use the Professional version commercially to provide remote support and file transfer, and whilst it is not cheap, but it is a very good product. Again there are other similar products available including free ones but I prefer the higher security and better functionality of TeamViewer. Either solution should provide all you have requested with ease, and both are free if you are doing open source or volunteer work. Chris Bray