As I have copied files on a USB 3.0 drive between two SSD based Macs (10.12 Sierra and 10.13 High Sierra), I have noted that there is a significant difference in performance depending on what file system I have chosen for the USB Drive.
I have read some performance comparisons, but they are either outdated or Windows-based and they appear inconsistent with my findings from the file copying.
Hence, could someone share some insights on what file system to use for the purpose of copying files most efficiently between SSD based Macs using a USB 3.0 Drive? (The performance of the drive will also factor in, of course, but in this question I am interested in the effects of the file system as they can potentially reduce the effective performance of a USB Drive.)
The file systems that I have available to choose from in my MacOS setup:
- MS-DOS (FAT) [Disregarding the 4GB file size limit to focus on performance]
- Mac OS Extended (Journaled)
(I am disregarding the Encrypted and Case-sensitive alternatives of Mac OS Extended assuming that they will not perform better.)
What I am doing is
- copying to and from a USB 3.0 Drive (meaning that both writes and reads will factor in)
- approximately 300 GB of data consisting of tens of thousands of files with a file size of a few KB's up to hundreds of MB's. (There are some files in sizes of GB as well, but they are exceptions.)
If I left out something significant from the question, let me know and I am prepared to update the question as needed.