I just bought my 4th external USB3 SSD for my MacBookPro. I obviously don’t use all of them together, I just was just constructing my latest external Sockle storage bay. This time it’s a 1TB SSD and it’s a generation T5. So this was a good moment to compare it to my previous T1 and T3 SSD drives. I use the Blackmagic Disk Speed Test app to get realistic read and write data transfer rates. I will round them off to the nearest multiple of 10MB/s.
Benchmark: internal 500GB SSD
We will compare all the disks with the performance of the internal SSD disk, which has a SATA-III connection (not the slower USB 3 connection): 560 MB/s write – 720 MB/s read speed.
EXTERNAL SAMSUNG SSD: T1/T3/T5
|The T1 generation of SSD (in my case a 500GB) is the slowest: 260 MB/s write and 360 MB/s|
|The T3 generation of SSD (I have 2 x 500GB ones) is a bit faster: 360 MB/s write and 400 MB/s read speed.|
|The last T5 generation of SSD (in my case a 1TB one) is the fastest: 420 MB/s write and 420 MB/s read speed. This is about 66% or 2/3 of the theoretical maximum transfer speed of USB3: 5Gbps or 625 MB/s|
EXTERNAL HD: Lacie Porsche 1TB 2.5″ ‘classic’ hard drive
Just to get a feel of just how much better that is than the old ‘rotating magnetic’ disks: the speed of a brand new 2.5″ 1TB Lacie Porsche disk: 130 MB/s read and write speed. That is 1/3 of the speed of the Samsung T5 SSD, at about 1/4 of the cost (1TB: 100 euro vs 420 euro – Nov 2017).
ALL IN ONE TABLE
|DISK||WRITE SPEED||READ SPEED|
|INTERNAL SSD (500GB)||560MB/s||710MB/s|
|EXTERNAL SSD (500GB T1)||260MB/s||360MB/s|
|EXTERNAL SSD (500GB T3)||360MB/s||400MB/s|
|EXTERNAL SSD (1000GB T5)||420MB/s||420MB/s|
|EXTERNAL HD (2TB Lacie Porsche)||130MB/s||130MB/s|