A reader asks:
“Why do files on an external hard drive run slower than files on my internal hard drive (not SSD)?”
They use two very different means of connection, and the speeds aren’t even close.
Internal drives usually connect directly to the mainboard via purpose-built high-speed interfaces meant specifically for moving hard drive data. For example, the common SATA 3.2 hard drive interface is rated at 16Gb/s.
Most external drives connect via a USB subsystem, which is a much, much slower means of general purpose data transport. For example, USB2.0 maxes out at just 0.48Gb/s; and the fastest available USB — USB3.1 Superspeed+ — has a theoretical top speed of 10Gb/s, or less than 2/3rds as fast as SATA3.2
Or, in shorthand:
● SATA 3.2 = 16Gb/s.
● USB3.1 Superspeed+ = 10Gb/s.
● USB2.0 = 0.48Gb/s.
Huge difference!
More Info:
USB: https://www.everythingusb.com/speed.html
SATA: https://en.wikipedia.org/wiki/Serial_ATA
Permalink: https://wp.me/paaiox-h8
Want free notification of new content like this? Click here!
Want to ask Fred a question? Click here!
Reply to this item via the Comment box below.
