hard drives

Hi! So I have two external hard drives that I have been using with my Mac no problem. At some point they just stopped connecting. They do not appear anymore. And the drive itself works, it makes noises and the LEDs show activity and then when it doesn't appear in the system it thinks it's idle...

I have a 5.1 Mac Pro tower...running 10.13.6 on an SSD out of my broken Imac and 10.14x on a 2 TB PCI drive, Radeon RX 580 8g, internal drives are the 512 apple ssd, 2tb crucial, 2tb 7200rpm and a 6tb 7200rpm....it will only boot 3 of the 4 drives in trays...and it does this in both operating...

Anyone have this kind of problem? TLDR below... I have a newer MBP that is running the latest software, and a 2009 MP with outdated software (10.9.5). I just recently did a big trip to Antarctica, Falkland Islands, Patagonia, etc. and have 200GB files to transfer over. The trip was bloody...

I am running the iPadOS public beta on my first Gen IPad Pro 12.9. If I purchase the lightning to USB3 camera adapter will I be able to read and write to the USB drives using the files app? The drives I have are small and powered by USB only. I have seen plenty of references to people...

Last night, I figured out that my router (a Panoramic combination router/modem from my cable company) has been interfering with my 2017 MBP (as well as two 2018 MBPs). Specifically, it was causing random dismounting of drives and a memory card. I recently bought and returned two 2018 MacBook...

I bought from Amazon a Seagate 6TB BarraCuda Pro internal hard drive (ST6000M004) which just arrived today, and I find that the threaded holes in the hard drive's case don't line up with the screws of the Mac's mounting brackets. This is a mid-2010 Mac Pro with four drive bays. I had one empty...

All my data hard drives, both internal and external on my MacPro5,1, are MacOS encrypted. Will I be able to just convert them from Mac OS Extended to APFS, or will I need to format and erase them? Also, is it advisable to convert all my data drives to APFS, including backup drives?