Error code 100060 when saving files to SD card

pmqv wrote:

Recently transitioned to a 14" MBP from my 2012ish MBP. I used an SD card reader with a micro sd card in the 13" for more storage space.

Now when I try to transfer files (of any type or size) to and from the sd card on my new computer I get that error code, sometimes immediately sometimes after a partial download. If I resume the transfer it will sometimes complete another partial chunk of the transfer, so in theory I can move things but it's tedious and requires me babysitting it and clicking every few minutes.

I've erased the sd card several times as well as ran First Aid on it, nothing comes up.

Try a different card and compare your results.

About the SD and SDXC card slot on your Mac - Apple Support

Erase and reformat a storage device in Disk Utility on Mac

https://support.apple.com/guide/disk-utility/erase-and-reformat-a-storage-device-dskutl14079/21.0/mac/12.0