@Death absolutely! There are many topics on this out there and I worked through the various steps and suggestions that most of them covered a few years back, but eventually I gave up because it just wasn't coming right.
There are some simple solutions, such as make sure your HDD is formatted correctly (FAT32). There are also bonkers solutions out there, such as if you have certain games like Resistance 3 data on your drive, the back up utility won't work. I even remember reading somewhere that if one of these games were ever installed on the internal HDD, the backup utility is forever screwed
A new light shines on the Alola region! Take on the role of a Pokemon Trainer and encounter Pokemon, uncover new tales, and unravel the mystery behind the two forms reminiscent of the Legendary Pokemon. These new titles power up the Pokemon Sun and Pokemon Moon content with new story additions and features, earning them the name 'Ultra!' Another adventure is about to begin!
Pokemon Ultra Sun and Pokemon Ultra Moon for Nintendo 3DS family systems offer an alternative story taking place in the same world as Pokemon Sun and Pokemon Moon, as well as new Pokemon that didn't appear in Pokemon Sun and Pokemon Moon.