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jswinden · 06-03-2017, 07:02 PM

Macs are not known for fast file transfer rates via USB 3 ports. I was really frustrated with a couple of my Western Digital Portable HDDs as they seemed to take forever to transfer files to and from them and my MacBook Pro 15" Retina 2014. So I bought a SanDisk Extreme 500 Portable SSD and found it was a lot faster than the HDD, as in 4+ times faster. I tested several external storage devices and cards I have, and listed them in order of speed. To test I copied a folder of files containing 3.37 GB of information from my MBP's internal SSD to the external storage devices/cards, and of course recorded the transfer time. All USB devices were attached to the USB 3 port via a USB 3 cable or connector. The two SD Cards were plugged into the MBP built-in card reader. Here are the results:

372.4 MB/s, MBP 15" Retina 2014 Internal SSD 250GB
174.3 MB/s, SanDisk Extreme 500 Portable SSD (SDSSDEXT-250G-G25) 250GB
71.0 MB/s, SanDisk Extreme Pro SDXC UHS-I Class 10 V30 (U3) 95MB/s Card 64GB
43.6 MB/s, WD My Passport Portable HDD (WDBKKF0020BSL-NESN) 2TB
27.7 MB/s, WD My Passport Portable HDD (WDBCGL0020BSL-NESN) 2TB
22.5 MB/s, Samsung USB Flash Drive (MUF-64BB/AM) 64GB
13.8 MB/s, SanDisk Ultra SDHC UHS-I Class 10 80MB/s Card 32GB

Interesting results. I assumed the SanDisk Extreme 500 Portable SSD would blow away the two portable HDDs, but I didn't think the SanDisk Extreme Pro SDXC card would also blow them out of the water.

06-03-2017, 07:02 PM	#1
jswinden Nameless Being	MacBook Pro File Transfer Rates Macs are not known for fast file transfer rates via USB 3 ports. I was really frustrated with a couple of my Western Digital Portable HDDs as they seemed to take forever to transfer files to and from them and my MacBook Pro 15" Retina 2014. So I bought a SanDisk Extreme 500 Portable SSD and found it was a lot faster than the HDD, as in 4+ times faster. I tested several external storage devices and cards I have, and listed them in order of speed. To test I copied a folder of files containing 3.37 GB of information from my MBP's internal SSD to the external storage devices/cards, and of course recorded the transfer time. All USB devices were attached to the USB 3 port via a USB 3 cable or connector. The two SD Cards were plugged into the MBP built-in card reader. Here are the results: 372.4 MB/s, MBP 15" Retina 2014 Internal SSD 250GB 174.3 MB/s, SanDisk Extreme 500 Portable SSD (SDSSDEXT-250G-G25) 250GB 71.0 MB/s, SanDisk Extreme Pro SDXC UHS-I Class 10 V30 (U3) 95MB/s Card 64GB 43.6 MB/s, WD My Passport Portable HDD (WDBKKF0020BSL-NESN) 2TB 27.7 MB/s, WD My Passport Portable HDD (WDBCGL0020BSL-NESN) 2TB 22.5 MB/s, Samsung USB Flash Drive (MUF-64BB/AM) 64GB 13.8 MB/s, SanDisk Ultra SDHC UHS-I Class 10 80MB/s Card 32GB Interesting results. I assumed the SanDisk Extreme 500 Portable SSD would blow away the two portable HDDs, but I didn't think the SanDisk Extreme Pro SDXC card would also blow them out of the water. Last edited by jswinden; 06-03-2017 at 07:11 PM.