How to upgrade an iPod for 2018 with flash memory and a new battery

Apple’s iPod is probably the pinnacle of personal audio devices. Sure, Android and iOS phones can play music with their fancy streaming services and gigabytes of storage, but nothing beats the elegant style, refined design, and tactile click wheel of a classic iPod.
Using an iPod in 2018 can be rough, however: 30GB of storage on a hard drive with slow speeds and annoying skipping isn’t a good user experience, no matter how nice Apple’s hardware is. Fortunately, we can fix that