SF3 Series SxS PRO X Thunderbolt Card Reader
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Driver (8)
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FAQ (1)
IDArticle TitlePost Date
1135 Can I format an SxS card in UDF format in macOS?Jan-20-21
Yes, but you must use Terminal.
1) Open Terminal

2) Run
diskutil list
to get the name of the disk. It will be something like "disk4". Ejectable media are typically the last in the list.

3) Run
newfs_udf -v "My Volume Name" disk4
if disk4 was the correct one. The volume name is anything you want of course.

4) Unplug and replug the SxS card
(Due to somebody's bug, the disk will only mount after being ejected.)

5) You can run
newfs_udf
without any parameters to see other parameters that can be set.

The process can be automated somewhat by writing a bash script, which can be looked up on the internet.