
On my iPod for example, if I added a 256GB SSD, the iPod would only ever be able to address 128GB of that memory, no matter what I do. * Regarding the SSD you have installed into your iPod, you should with consult the supplier who provided the SSD, because there are limitations on how much of the memory can be addressed by the software and that's not something that Apple even thinks about since it's not their upgrade. (On the iPod Touch, the different iOS versions reflect changes to the way the iPod works and different hardware, depending on which version of iOS is being discussed.) Certainly, my iPod had no updates for many years and as far as I'm aware the difference between the software versions 2.0.1 and later is due to different hardware within the device. However, regardless of whether yours has 2.0.4 or 2.0.5 as far as I know, there is no upgrade to the software available (but see the next paragraph*).

I believe that 2.0.1 was the last available software for the 120GB iPod Classic. The Wikipedia article for the Classic mentions only 2.0.5. To my knowledge, the last iPod Classic model (6th generation, 2nd revision, also knows as 7th generation) was originally shipped with 2.0.2, and there was an update to 2.0.3. The Classic's software is known as 1.1.2 PC (well, mine is) Songs from the Apple Music catalog cannot be burned to a CD.The iPod Classic does not use iOS.

Screen resolution of 1024x768 or greater 1280x800 or greater is required to play an iTunes LP or iTunes Extras.To play 1080p HD video, a 2.4GHz Intel Core 2 Duo or faster processor, 2GB of RAM, and an Intel GMA X4500HD, ATI Radeon HD 2400, or NVIDIA GeForce 8300 GS or better is required.To play 720p HD video, an iTunes LP, or iTunes Extras, a 2.0GHz Intel Core 2 Duo or faster processor, 1GB of RAM, and an Intel GMA X3000, ATI Radeon X1300, or NVIDIA GeForce 6150 or better is required.To play standard-definition video from the iTunes Store, an Intel Pentium D or faster processor, 512MB of RAM, and a DirectX 9.0–compatible video card is required.PC with a 1GHz Intel or AMD processor with support for SSE2 and 512MB of RAM.
