I want to connect my tower PC to an external 2.5" hard disk for daily imaging. The PC has USB 3.0 ports, speed 5 Gbps (now officially "USB 3.1 Generation 1"), with type A connectors. I will alternate everyday between 2 Seagate Barracuda 1 TB disks in their separate enclosure. I don't plan to use the high-current, charging features of the USB standard's C connector (although it would be nice to have them).
I plan to look for a cable with the following specs :
- Length : 1,8 m to 2 m (6 ft.)
- Connectors : type A on one end, type C on the other.
- Speed : 5 Gbps, USB 3.1 Generation 1.
Does such a cable even exist ? Does the standard allow for it ? Is it readily available ? Despite much research, I'm not sure about the answer.
This choice is based on the following assumptions. Can you validate them ?
- Last generation USB speed of 10 Gbps (USB 3.1 Generation 2) does not offer significant improvement over 5 Gbps (USB 3.1 Generation 1) for mechanical disks.
- Type C connector is more robust than the ubiquitous Micro B which is found on most external enclosures for 2.5" disks. E-tailers review sections are swamped with buyers of such enclosures complaining that their Micro B connector has failed them after a few months use.
- 2 meters is probably around the maximum if one wants to reach the speed of 5 Gbps on USB 3.1, given the customary wire gauge on such cables (30 to 28 AWG).
And some other related questions :
- Are type C + type A cables symetric ? In other words, is it indifferent that the C connector on one end is plugged in the host (computer) or peripheral (disk) ? Or are there cables where the C connector is only meant for the computer, and others where it is only meant for the peripheral ?
- Can I use for my purpose cables primarily marketed for charging phones, such as this one or this one ?
- Is it important that the cable is certified ? It seems to me that most USB 3.0/3.1 cables are not, and that the few that are charge a big premium.
- Should I look for a minimum wire gauge with the above specs ?