Copying an SD card using dd does not copy exactly - Ask Ubuntu
How To Clone Your Fiat Spider's Navigation SD Card on a Windows PC (you don't need special software) | Fiat 124 Spider Forum
How to clone SD cards on Linux
dd Utility - Write and Backup Operating System IMG and ISO files on Memory Card or Disk | How To | The Fan Club | dynamic design solutions
Full Metal Backup Using the dd Command - Linux.com
image - How to shrink the size of your sd card before using dd to backup your sd card - Raspberry Pi Stack Exchange
How to Back Up Your Raspberry Pi as a Disk Image | Tom's Hardware
How to clone Raspberry Pi SD Card on Linux and shrink it to actual size – The Linux Notes
How to create SD Card DATA dump image to .ISO with dd and mount it with imdisk from command line on Windows CygWin with MobaXterm - ☩ Walking in Light with Christ -
Easy Resize and Back up Raspberry Pi SD Card with Ubuntu •
How to Back Up Your Raspberry Pi Project Files | Raspberry Pi | Maker Pro