I cannot capitalize file names in a new portable SSD device

[drpeppercan]

I just got this Crucial X6 2Tb Portable SSD 2 days ago.
I already copied a TB of files, mostly JPGs, PNGs, and MP3s.
Other than the slow copying - 40Mb/s, about 12 hours - I have noticed that I cannot capitalize the file names of my MP3 files. I have tried other types of files, PDF, HTM, and Txt, the same result. I have tried this in Windows 10, Windows 11, and Linux (Pop!OS), to no avail. I also tried renamer utilities, including but not limited to, the one included in the MS PowerToys.
Only if I change a complete word does it work.
Any ideas?

Thank you guys!

DPC

[drpeppercan]

It was all about the File system!
It was exFAT before, no wonder!!!
I converted it to NTFS and it's all good now!

DPC