FTP software (Freeware)

HI,

Does anyone know of a freeware software for FTP downloads to allow me to copy our web site onto my network server from the ISP for backup. I presently am using WS_FTP Pro demo but it expires in a few days. The purchase price is $39.95. Justthought I would see if anyone was using a free FTP software that had a windows explorer interface they would recommend or should I purchase the one I am using? I only need it whenever my website is updated to download the updates to my server for those directories edited.

thanks,
Rob