If you just want to make a simple backup, you can create an image file of your CDs and upload them to somewhere like the Internet Archive to preserve their content. There are various software capable of creating image files, including InfraRecorder and WinCDEmu. Here's a simple guide on how to create an ISO image file from a CD or DVD. Source: 12 months ago

Despite what the page says, the file in question is actually a .img file, which won't be accepted by most programs out of the box. To convert it into a more usable .iso format, I would recommend using WinCDEmu for Windows, but other CD-related tools should be able to do the job as well. I don't know of any solutions for MacOS or Linux; comments for those platforms would be appreciated! Source: about 1 year ago

What? oh. I used this version from the wayback machine, and then opened the iso with THIS handy dandy and quite small tool! I do that with a lot of games actually,. Source: about 1 year ago

Use WinCDEmu to mount the ISO, not the built-in Windows "Mount" command. Source: about 1 year ago

I downloaded Preinstalled ZIP folder (2.26GB) and used WinCDEmu (an open-source CD/DVD/BD emulator) to mount the file. This is because the games were originally released on CDs or DVDs. ISOs and ROMs are basically electronic versions of the original game discs. OGD has a guide on all of this. Source: about 1 year ago

The p7zip port of 7-Zip is several releases behind and the project seems to be abandoned. I discovered this when a large archive failed to extract with Engrampa which uses it. It reported a "Headers Error" which is due to a compatibility problem between zip format implementations. 7-Zip has a fix but the port doesn't. But there's a fork on GitHub which is being actively maintained. Check it out. Source: over 2 years ago

I use Engrampa. Which archive format I use depends on the use case. For example, if Windows users are involved, I usually use Rar archives. Under Linux, I usually use tar.xz. Source: about 3 years ago