Debian on CDs/DVDs
https://www.debian.org/CDDownload CD/DVD images with jigdo. The "jigdo" scheme allows you to pick the fastest out of 300 Debian mirrors worldwide for your download. It features easy mirror selection and "upgrading" of older images to the latest release. Also, it is the only way to download Debian DVD images for all architectures. Download CD/DVD images with BitTorrent.
Debian -- Getting Debian
https://www.debian.org/distribDebian 10 ("Buster") Buy a set of CDs or DVDs from one of the vendors selling Debian CDs Many of the vendors sell the distribution for less than US$5 plus shipping (check their web page to see if they ship internationally).
Debian -- Getting Debian
www.debian.org › distribDownload an installation image. Depending on your Internet connection, you may download either of the following: A small installation image: can be downloaded quickly and should be recorded onto a removable disk. To use this, you will need a machine with an Internet connection. 64-bit PC netinst iso; 32-bit PC netinst iso
Downloading Debian CD/DVD images via HTTP/FTP
https://www.debian.org/CD/http-ftpTo install Debian on a machine without an Internet connection, it's possible to use CD images (700 MB each) or DVD images (4.7 GB each). Download the first CD or DVD image file, write it using a CD/DVD recorder (or a USB stick on i386 and amd64 ports), and then reboot from that. The first CD/DVD disk contains all the files necessary to install ...