This is a community-based FAQ. Please also have a read of the Official C64 Mini FAQ too.

Have a read of these two pages for some possible reasons:

• Correctly formatting your USB sticks
• USB Memory Stick Problems

There is currently a display limit of 256 items (files and/or folders) on USB memory sticks per folder, including the root.
Files take priority over folders, so if you go over that item limit, files are always displayed in preference to folders.
For solving this out, this utility could be of a great help:

• RomSort - a small utility to sort a directory of files into alphabetical sub-directories. It could intelligently combine the smaller sub-directories.

Members of community have reported success with various devices, which have been compiled into lists on this page:

• Compatible hardware

Read the page “Playing games that span multiple disks”.

• Read about it at official site, here
  
• Use
  • CJM Configurator for Windows aka C64MiniLoaderCFG (Emanuele Bonin's windows app) (direct link)
  • CJM Configuration File Tool online (Darkuni's web-based solution; official support)

You can use this very simple batch script. Explained here:

• Multi-cjm batch script

There are more then 30000 titles and it is still growing. It is hard to cover it all. This selection guide could be helpful to start with:

• Past magazines
  • The Computer Magazine Archives at The Internet Archive
  • Commodore Magazines at DLH's Commodore Archive
  • Computer Gaming World archive at CGW Museum
  • Magazines list at https://www.c64-wiki.com/
• Current magazines
  • Freeze64 (early supporter of TheC64 Mini!)
  • RETURN (German)
  • "List of all current magazines/fanzines" at Lemon forum
• C64 News aggregators
  • Magazine or C64 news at Commodore News Page
  • C64/SX64 News and Rumors at Nightfall
• YouTube channels (plenty of), Facebook… Google is your friend.

Multi-shop

• Cronosoft https://cronosoft.fwscart.com/
• poly.play https://www.polyplay.xyz/
• Pond Software Ltd. https://pondsoft.uk/
• Protovision https://www.protovision.games/
• Psytronik http://www.psytronik.net/newsite/ or https://psytronik.itch.io/
• RGCD (Retro Gamer CD) https://www.rgcd.co.uk/

Other

• Covert BitOps (“Hessian”, “MW” saga…) http://covertbitops.c64.org/ or https://cadaver.github.io/
• Dr. Wuro Industries (“Shadow Switcher”) http://www.drwuro.com/
• Knights of Bytes (“Sam's Journey”) https://www.knightsofbytes.games/
• Out of Order Softworks (D42-Adventure System, “Leisure Suit Leo”…) http://www.out-of-order.info/
• Retronics (collector's editions and reissues) http://retronics.eu/kolekcjonerska-edycja-gier/ or https://www.facebook.com/retronics.eu/
• Stirring Dragon Games (“Unknown Realm”) http://www.stirringdragon.games/ or http://unknownrealm64.com/
• Thalamus Digital (“Hunter's Moon Remastered”) http://www.thalamusdigital.co.uk/
• The 8-Bit Guy (“Planet X2”) http://www.the8bitguy.com/download-davids-software/
• The New Dimension (“Vortex Crystals”, many more) http://tnd64.unikat.sk/