disk utility – How can I mount or restore this ExFat USB stick utilizing my Macbook?

I’ve a 64 GB USB-C flash stick from Samsung that was new in October 2024, which I formatted with a device from my automobile’s producer that it insisted on. Making it a ExFAT quantity that comprises map updates and optionally media like MP3s. I had success studying it within the automobile, and success including media to it utilizing the Mac after I was on MacOS 14 Sonoma. Now I insert it on my up to date MacBook working MacOS 15 Sequoia, and it simply would not mount. It reveals up in Disk Utility and as disk4 with disk4s1.

Is not ExFAT supported and should not it work? I am going to present you what I attempted to date, and I’m wondering if there’s one thing else I ought to attempt.

Here is what the terminal says about mounting it learn solely:

dlamblin ~ % diskutil mount disk4s1
Quantity on disk4s1 didn't mount
In case you assume the quantity is supported however broken, attempt the "readOnly" choice
dlamblin ~ % diskutil mount readOnly disk4s1
Quantity on disk4s1 didn't mount
In case you assume the quantity is supported however broken, attempt the "readOnly" choice

Prepending sudo would not change the output to both of those.

And maybe you wish to see what it says in Disk Utility:

Oh, and First Support complains about permissions, however the terminal model of diskutil would not behave any higher with sudo permissions.

E.G. with sudo:

dlamblin ~ % sudo diskutil mountDisk readOnly disk4
Quantity(s) mounted efficiently
dlamblin ~ % df -h
Filesystem        Measurement    Used   Avail Capability iused ifree %iused  Mounted on
/dev/disk3s1s1   460Gi    10Gi   324Gi     4%    412k  3.4G    0%   /
devfs            208Ki   208Ki     0Bi   100%     720     0  100%   /dev
/dev/disk3s6     460Gi    15Gi   324Gi     5%      15  3.4G    0%   /System/Volumes/VM
/dev/disk3s2     460Gi   6.4Gi   324Gi     2%    1.2k  3.4G    0%   /System/Volumes/Preboot
/dev/disk3s4     460Gi   2.2Mi   324Gi     1%      51  3.4G    0%   /System/Volumes/Replace
/dev/disk2s2     500Mi   6.0Mi   481Mi     2%       1  4.9M    0%   /System/Volumes/xarts
/dev/disk2s1     500Mi   5.4Mi   481Mi     2%      33  4.9M    0%   /System/Volumes/iSCPreboot
/dev/disk2s3     500Mi   2.7Mi   481Mi     1%      85  4.9M    0%   /System/Volumes/{Hardware}
/dev/disk3s5     460Gi   102Gi   324Gi    24%    1.0M  3.4G    0%   /System/Volumes/Knowledge
map auto_home      0Bi     0Bi     0Bi   100%       0     0     -   /System/Volumes/Knowledge/dwelling
/dev/disk3s7     460Gi   2.0Gi   324Gi     1%    139k  3.4G    0%   /nix
/dev/disk3s3     460Gi   986Mi   324Gi     1%      38  3.4G    0%   /Volumes/Restoration
dlamblin ~ % sudo diskutil verifyDisk disk4s1
A complete disk have to be specified
dlamblin ~ % sudo diskutil repairDisk disk4s1
A complete disk have to be specified
dlamblin ~ % sudo diskutil verifyDisk disk4
Unable to confirm this complete disk: A GUID Partition Desk (GPT) partitioning scheme is required (-69773)
dlamblin@ ~ % sudo diskutil repairDisk disk4
Unable to restore this complete disk: A GUID Partition Desk (GPT) partitioning scheme is required (-69773)

Possibly it is MBR partitioned now? However once more, it labored earlier than. Was there some MBR assist I forgot I added to Sonoma that I ought to add or allow?