The M4 chip is a 5nm system-on-chip designed by Apple, featuring a 10-core CPU and 10-core GPU for improved performance and efficiency.
Yes, the Mac mini is compatible with most existing USB-C devices, including printers, scanners, and external hard drives, thanks to its Thunderbolt 4 ports.
Unfortunately, the Mac mini's RAM cannot be upgraded or expanded by the user, so it remains at the factory-installed 16GB.