Please, someone help me with this Samsung T7 SSD issue!

Absolute nightmare. My T7 SSD was working with my Mac and Samsung A52s phone before my holiday. Used an SD card adapter with my Sony A7IV SD card and DJI pocket 2 Micro SD card to transfer files to my SSD using my phone, and then transferred on to my Mac. That was tested rigorously with 10gb of data. THEN after my holiday and 200gb later... boom, it doesn't work on my Mac. So I copied the files to a micro SD using my phone, formatted the SSD in my Mac to "AFPS" like Apple support said, copied the files back to the SSD from the micro SD card and BOOM....my Samsung A52s phone no longer recognises the drive and wants me to format it to something that works.

What the **** can I do? It came as ExFat but "Master Boot Record" too, how do I format it so my Mac won't play silly buggers sometimes, and that it will work with my phone? Thanks!

Long story short: APFS doesn't work with my Android phone. ExFat "MBR" doesn't work with my Mac. Before this, ExFat MBR worked with my phone, Mac, and (today) my PC, but then stopped working with my Mac.

Running OS Ventura 13.5.