external hard drive fails to mount

Hey folks, I have a new external SSD (Samsung T7 2TB) connected to my Mac Mini M2, but it's getting automatically unmounted when I plug in an older external hard drive. The SSD is set up for Time Machine with APFS format. As soon as I plug 2nd drive in (Verbatim Store 'n' Go 500GB, formatted as...

I had an iMac and had the time machine backing up onto a g-drive 6TB external hard drive. My iMac died (well, the hard drive and then something else) so instead of getting it fixed I ordered a new one. But in the mean time got a lend of an iMac from a friend. Now, when I plug in the external...

Hi, I'm still fairly new to MacOS and trying to learn my way around. I have several external hard disc drives and for some reason, they don't all mount/appear in MacOS. I'm not sure what to do about it or how to get them to appear. They are all formatted exFAT so they can easily be read across...

Hi all, I have an external hard drive (WD EasyStore) with 10+ years and >1TB of information on it that I mistakenly pulled out without ejecting properly. Now the drive is seen by the Disk Utility but will not eject or open in read only when running commands in terminal. I only have a mac so...

I finally talked my mom into replacing her 2008 MacBook (El Capitan 10.11.6) with a 2019 iMac (Mojave 10.14.5). Last year I bought her a WD Passport Ultra 1Tb to serve as her Time Machine. I have a 2016 MacBook Pro (High Sierra 10.13.6). I backed her 2008 MacBook up tonight with her Passport...

Hi there I've got a 1 TB WD Elements harddrive that is not reading on either my Mac or Windows. I've tried it on a couple different macs (though neither worked), one is OS X El Capitan and the other is MacOS Sierra. Previously I could read it on both Mac and PC systems but could not transfer...

Hello, I have an external hard drive that use to show up on my iMac (2017 High Sierra), but it has stop showing up. It lights up and I can feel that its on so I know its working. Below are the steps I took to fix it: I tried different usb ports put it doesn't show up. I plugged in my spare...

I just bought a new external hard drive and was attempting to reformat it from ExFAT to APFS encrypted. The operation failed and now the disk won't mount (thought it still appears in Disk Utility). I have tried to reformat and use first aid but neither will work. Any help or suggestions are...

Hi all, An explanation of these various problems, and a simple solution, is below. I had a lot of hassle with trying to solve these five problems: 1 - Trying to mount an external hard drive, crashes the mac. 2 - The external hard drive fails to mount, (but doesn't crash the mac). 3 - Trying...