USB 3.0 Flash Drive Issue.

I am trying to migrate from a old XP based laptop to a new MacPro. I backed up my picture files onto the a 64gb flash drive, woked fine. Now I am trying to move them from the flash drive onto my Mac. Worked well for the first folder of files, but the other folders of files don’t show up on the flash drive on my Mac. Re-inserted Flash drive into old XP system and Explore sees all and all appear in tact. But can’t get my Mac to see them. Any suggestions? Mac is running Yosemite.

:smiley:   Hi Marshall,

Dear member of SanDisk Community, welcome.

Please, try to plug the USB flash drive in another port and directly into the Mac computer,

and not plugging it to USB-port on the keyboard.

Because maybe not receive the necessary power.

Luck, and then you tell us, what happened, please.

Regards, Alfred.                                                           (Google translated)

hmmmm Does the  MacPro  support the exFAT drive format?

The flash drive was plugged direct to the MacBook, swapped usb ports, but no change.

It successfuly copied a file from the flash drive. It was a large folder with about 20gb of files. So I must assume FAT… is supported, however size may be a influencing factor.

Operating Systems that Support the exFAT File System:

Transferring a 4GB or larger file to a USB flash drive or memory card:


If the MacPro can read some files from the 20 GB folder on the USB drive the 4 GB size limit is not an issue for the USB drive.  Does the MacPro have sufficient space to hold the 20 GB of files?  I would certainly think so since it’s new.  Does the Mac have a problem with certain types of files; music files, movie files, executable files, etc?  Maybe it’s a Mac configuration problem or a security setting problem?