I was fighting to copy 200GB of data from one USB drive to another on my Mac this morning. Both drives kept disconnecting, I tried to use rsync to at least be able to pick up where I left off, it just wasn't happening. Because USB (and Bluetooth) remains an absolute binfire on macOS.

So I plugged both devices into my old Dell tablet, running Ubuntu. No problems, getting ~900mb/s throughput, all done in minutes.

"It Just Works", my arse... 😒

@WiteWulf

Software the root of the problem? Or hardware?

#UniversalSerialBus

@JdeBP USB’s always been flaky on macOS/OSX, but is suspect my old powered USB hub may not have been helping. That said, direct-connected USB-C devices kept disconnecting, too.

@WiteWulf

I had some #UniversalSerialBus problems recently that I put down to power initially, which is why I was curious.

I've been having one on a #RaspberryPi that I originally thought was device hardware/hub issues, too. There are two HIDs plugged into a KVM, and both of them have extra buttons and keys above the norm.

I was fully ready to blame that for the problem, until I booted the Pi up without any USB connected at all and still the phantom keystrokes that were plaguing the bootstrap were appearing.

Must be software, then. (-:

I'm confident that the cheap and cheerful card reader from a computer fair years ago is genuinely crap in hardware, though. It has not worked when plugged in to several things, now.

I even tried putting the TF card into an adapter and putting it into the bigger slot.