Save my website

I wish to make a copy of my website so that if there is a problem with the server company i use i will not loose all the writing, pictures, and pages. in the future i may use this hard copy to make a new and different website. i think i need a FTP copy. how long and how much to do this. How much storage will i need The website is maybe about 1000 pages and has about 1000 pictures. Thanks for your time Zengolfer