A few versions of Linux Mint ago, there was a program called "fslint" that would identify redundant files, empty folders, filename errors, allow you to delete files, etc. After about Linux Mint 20.x, fslint was no longer available. I stumbled across a similar program called "czkawka" which has similar capabilities. I use it often, after accidentally merging two separate backup drives onto one 4 TB SSD. Some of the files are present 15 to 30 times and so are the folders. "czkawka" is available from the Synaptic Package Manager. For LMDE-7, you need to install Synaptic Package Manager using "Software Manager"
My brain, my arms, my hands, my legs, my feet, my eyes, my ears, my nose, my mouth, my memories, my instincts, my imagination, my ability to tell shit from shine-ola,