Not that anyone asked, but the smallest capacity SD card you can put in a 5/5.5th gen is 128MB. The firmware takes up about 100MB, leaving 26MB for your media. : r/ipod
How to revive an iPod with a hard drive using flash storage - iPod + iTunes + AppleTV Discussions on AppleInsider Forums
Flash Storage Upgrade and Refurbishment - iPod classic
A Visual History of the Apple iPod | PCMag
The iPod Classic's replacement is the iPod Classic | by Lewis Isaacs | Medium
Apple iPod Video (60/80GB)/Classic (120/160GB) 5th/6th Generation. High capacity 700 mAh Li-ion battery
Apple iPod Touch 5th Gen - Choose Your Storage UK | Ubuy
Identify your iPod model – Apple Support (UK)
Apple iPod mini | Science Museum Group Collection
Apple doubles iPod touch storage to 32GB for $199, kills 16GB & 64GB models | AppleInsider
History of the iPod: From the First iPod to iPod Classic
Original iPod first went on sale 12 years ago with 5GB of storage capable of holding 1,000 songs | TechSpot