Dropbox is a really good website/ software with the help of which you can upload big files over the cloud and then can share the link with anyone you need to share the files. I use it fir both official and personal use and is a regular user. I have it inatalled on even my mobile and I use it to share big files with friends over the web. its easy, fast, secure and reliable. the best part is you can use it for free and if you simply need to download the file sent by someone to you, you can simply download it from the link without even need to login.