Questions tagged [external-disk]

A storage device attached to a computer, but not enclosed within the computer's casing

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115 views

Rescue Fusion Drive

Local Apple support suggested me to change the 2 TB Seagate Fusion drive with a 2 TB SSD to increase speed in my 27" Retina iMac with macOS Sierra installed. I had a full backup done with Carbon Copy ...
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How to fix Seagate backup plus not readable on Mac? [duplicate]

I never had a problem with Seagate backup plus for Mac desktop until now. I connected it, and it keeps saying "disk not readable". I have only used it on one device. I have options to initialize, ...
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Why would my external USB3 drive (a Drobo) keep getting disconnected?

I have a mac mini (Mid 2011) running High Sierra (10.13.4) that I've been trying to use a home server. I'm not sure what the cause is, but my external USB drive (a 3rd-gen 4-drive Drobo) keeps ...
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1answer
65 views

How to find if a USB has been plugged in on a certain date? [duplicate]

Starting from this great script offered by Daniel Azuelos cd /Volumes/suspicious_USB /usr/bin/sudo find . -atime -21 -exec ls -dluT {} \; How is it possible to modify it in order to find if a USB ...
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Is “Ignore ownership on this volume” reversible?

In other words, does it just hide the permissions on file, or change them? More specifically, if you have a volume with file on it that have different owners and you check Ignore ownership on this ...
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9k views

How do I dismiss many multiples of the “Disk Not Ejected Properly” notification in macOS?

Today I'm dealing with the following problem: Is there some way I can get rid of these without spending my entire day clicking, short of Homer's Drinking Bird? Note: This is not a duplicate of ...
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External Filevault disk permissions don't match users on migrated computer

I created a (bootable) backup disk for use in Carbon Copy Cloner and applied Filevault 2 following the CCC instructions. I am using the backup disk to transfer the files to a new computer. The old ...
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3answers
1k views

Connecting a FireWire 800 external hard drive to MacBook Pro early 2013 through its USB 2 port

I need to connect a FireWire 800 external hard drive to a MacBook Pro early 2013 through its USB 3 port. I would have done so through the Thunderbolt port but the adaptor for that is too expensive ...
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2answers
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Mid 2010 Mac Pro 5.1 Drive Is Failing

It still works but am afraid it will unexpectedly die. I bought a new drive that's compatible but don't know how to transfer data from old to new after I install the new drive. Can I use Time ...
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2k views

MacBook Air unable to write to external Harddisk

I have a MacBook Air with mac OS Version 10.13.4 and I am not able to write to external disks formatted in format "Windows NT File System (NTFS)". It is definitely not an issue with the drive as I ...
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1answer
1k views

Failed High Sierra update, can't mount drives, how to recover files?

The issue is with Apple MacBook Air "Core i5" 1.6 13" (Early 2015). It had not been backed up in a while but an update to High Sierra was attempted. The update failed and now a regular boot or safe ...
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Filesystem for external hard disk that is cross-platform compatible [duplicate]

All my previous backup disks are either ext3, ext4, ntfs or fat32. I am having tremendous difficulty accessing my files easily from my mac (even with tools such as Tuxera). I did not expect an OS to ...
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185 views

How to safely and conventiently have an external drive connected to an OS X laptop [duplicate]

We all know that notification 'Drive X was not ejected properly'. I have a laptop, which I use regularly at my desk with monitor etc, as well as on the go. I want to be able to back up my data to an ...
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1answer
44 views

Impacts on Hard Drive when boot externally in MacBook Pro

I am using MacBook Pro Mid 2012 and it's been running really slow for the past few weeks and i was able to recover from that when I plugged the hard drive externally, so i think the issue is with the ...
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Why am I receiving this error when attempting to unmount external CF card?

Sometimes I receive the following error when trying to unmount an external USB, CF, or random drive: dissented by PID 17728 (/usr/bin/login) I attempted to cd out of the drive directory, and into my ...
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2answers
251 views

Backing up external hard drive shared by two macs to network share without duplication

In my household, there is a MacBook Pro and MacBook Air, both of which backup to a NAS via Time Machine. There is also a portable external hard drive that we use for storing large media files. I would ...
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1answer
2k views

HFS partition fails to mount on Mac after being mounted on Ubuntu

I recently followed the instructions here to mount an Apple-formatted HFS external drive on Ubuntu. I transferred the files I needed, then unmounted the drive. Now the drive won't mount in OSX. In ...
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3answers
373 views

Avoiding Spotlight to spin up external drive

I have Mac Mini with an external hard drive. The external drive is indexed with Spotlight. Whenever I use Spotlight to start an app on the local machine, the external drive spins up, because obviously ...
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1answer
185 views

My user preferences are gone after restart

I restarted my computer and it's like I have a new install. The system tells me it can't find a telephony file and my login startup items are gone. All my Finder preferences and other settings are ...
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1answer
1k views

External hard drive no longer appearing on my desktop or in Disk Utility

My hard drive usually works on my MacBook, but today it has decided otherwise. My hard drive works on the TV and DVD player. However, when I plug it into my Mac the light comes on and I can hear it ...
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2answers
311 views

How should I migrate my iTunes library to a larger external disk while preserving metadata?

I currently have a set up where my default iTunes Library (of ~550 HD movies) resides on a 2TB external HD. I share this library and use it to serve my Apple TV/other LAN devices. The drive is close ...
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1answer
175 views

How to keep track of external hard drives?

I have about 7 external hard drives of varying capacities. From time to time, I move files from my MacBook onto those external drives and put Finder aliases where those files used to be. The process ...
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1answer
81 views

Transferring data to a new external hard drive without breaking links

I'm trying to migrate my data from an old external hard drive to a new one. When I copy and paste from within Finder, the data seems to expand to take up much more space, so I'm assuming some link ...
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1answer
502 views

How to reformat a hard drive previously used for Time Machine

Previously I had backed up my Mac files on my old external hard drive on time machine. This made the hard drive only visible and usable by Time Machine. How would I reformat the drive so it goes back ...
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1answer
62 views

Which is more future proof for external HD, USB-C or Thunderbolt 3? [closed]

I'm considering to get a new external HD for my Mac setup. While I have an old MBP 2013, I'm planning to buy a new Mac this year (possibly iMac). Which is more future proof? USB-C or Thunderbolt 3?
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1answer
38 views

How to download photos from iMac desktop to external drive (WD 1 TB My Passport )

Bought a new iMac desktop and want to download loads of photos to an external drive I just bought (WD 1 TB My Passport. I clicked initialize but still can't figure out how to download the photos to ...
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2answers
83 views

Finder displays Refresh and X symbols instead of Eject for external storage device?

Typically, Finder displays the Eject symbol next to an external storage device, and an inverted version during mouseover, like this: but today, Finder displayed a Refresh symbol, and an X during ...
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1answer
525 views

How to store home and applications folder on another drive

I am interested in setting up my home folder and /Applications in another hard drive like you can with Linux. Is there a way how to do this? I would also like to make sure that it won’t cause any ...
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1answer
50 views

formatting external drive multiplatform compatible filesystem from macOS High Sierra

I have a 160GB external hard drive connected via USB I pulled it from a windows pc to MacBook running MacOS High Sierra, I want to format the hard drive to a file system that should work with Windows, ...
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1answer
59 views

Mercury Elite Pro Dual mini only getting 250MB/s read and write

I have a Mercury Elite Pro Dual mini with dual 4TB drives in hardware RAID0 (the enclosure has a raid switcher). I have formatted the drive to APFS. I am connecting to a 2016 MBP w/TB using the ...
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1answer
92 views

Understanding Disk Utility: external drive returns I/O error but Disk Utility says it's OK

Having recently purchased Backblaze, I'm currently backing up to the cloud my 4TB WD external drive (7 months old). The backup process can run without problems for a few hours (ranging between 4 and ...
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2answers
155 views

Re-formatting a external Western Digital My Book drive

My new Western Digital My Book external drive will not erase to re format for my iMac. That is to say it starts but then goes no where. No green in the bar. What's up?
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332 views

Password Hash - External drive encrypted with Disk Utility

don't laugh, but I have encrypted my external drive and cannot remember the password. The good thing is, the password was really bad (only four digits), so I could get it with brute force. You don't ...
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992 views

Recovering folders in executable drive converted into 0 byte “Unix Executable” files

I had an, MS-DOS formatted external flash drive connected to my MacBook. It had bent a few files at the next. Most probably because of this, when I accidentally brushed my finger against it, it ...
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1answer
101 views

Mac and external HD permissions

I'm wondering if my HD gets stolen, and my current permissions are set to: User: R&W Staff: R&W Everyone: R only. Would anyone be able to plug it to a mac (it's a HFS+ partition) and just ...
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1answer
546 views

sparsebundle reverting to read-only

I have a wireless drive [WD My Passport Pro] and of course I want to encrypt it, but of course there's no way to encrypt the actual drive with FDE and still have it recognized by the Passport's ...
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1answer
641 views

Time Machine Backup via another Mac? [closed]

Since I have broken Permissions, which can't be fixed now, because my sudo is broken too, I want to create a Time Machine Backup. Now the problem: both of my USB-Ports are broken. After some research ...
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2answers
354 views

How to merge MBR mapped external drive partitions using macOS High Sierra?

Background: I got a new computer recently, a new MacBook Pro running High Sierra. My old computer was a 2011 MacBook Pro, and I used an external drive to back it up with Time Machine. The drive has ...
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1answer
1k views

Using bootcamp on an external drive - Can you run it on different mac computers?

If I were to use a portable ssd as the bootcamp partition, would I be able to use it on different mac computers?
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1answer
857 views

Corrupted USB Drive - Unable to Partition or Erase Disk

I am heavily struggling with a corrupted USB. The problem I am facing is that I can neither partition nor erase the Disk. The disk is empty and there is not partition created. I can also not find a ...
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1answer
169 views

USB Hard drive has very small chance of being recognized by Macbook Pro each time it is connected, but works with other machines

I have a WD "My Passport" 1TB external hard drive. It isn't recognized by my Macbook Pro (retina, 2013) or a friend's very similar model, but it works with every other machine I've tried, including ...
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1answer
463 views

Accidentally ejected External drive while downloading file, now having problems reading

I'm hoping someone can help! I recently downloaded a torrent directly onto an external hard drive, (using a 2009 MacBook Pro and 1TB Seagate Expansion portable Drive) somehow during the download the ...
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2answers
638 views

2011 iMac with Dead internal HDD. Possible to boot from an external disk?

My iMac HDD just gave up after making a loud clicking noise for several weeks. Since the internal HDD is dead, I want to use another disk, preferably an SSD. I do not want to go to a store at any ...
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Seagate expansion format for mac

I buy a new one. I am trying to format support for my mac air. I tried all the way by seeing some procedures showing on the youtube even no luck. I disk is appearing like this: Need help, please
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1answer
266 views

Finder displays wrong volume names, drive status (High Sierra)

My JetDrive volume is inexplicably showing as "Dropbox Installer" in the Finder. If I eject and re-mount it, the same. Also "TB Backup" is supposedly mounted, according to Disk Utility, but Finder ...
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1answer
2k views

After installing High Sierra can't mount external USB drive (TimeMachine), why not?

I installed High Sierra and now my iMac (27" 2011) can not see the external USB TimeMachine drive. The drive shows up in DiskUtil but it's greyed out. I can not mount it. In fact it doesn't respond ...
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388 views

USB Drives not showing up after Mac was sleeping

I am constantly encountering the following problem with my Mac(s). This has been happening with two different Macbook Pros (13" late 2011 and 13" 2017) with numerous MacOS versions, including the ...
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2answers
1k views

How to back up two internal hard drives using Time Machine?

I upgraded my macbook pro and have now two internal SSD drives (I removed the old drive and also the DVD drive). I have been using Time Machine to back up the 1st drive to an external drive, and I ...
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2answers
2k views

WD Passport not mounting

I copied a number of Adobe Premier Pro movie files and some mixed Pro Tools files onto a WD My Passport Slim from my Mac Pro in order to work on them on vacation. When I plug the external drive into ...
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1answer
140 views

Is there any danger to relaunching Finder while external drives are connected?

I tried to do a very large copy (2TB) by copy/paste to two external drives. It hung up on the "Preparing to copy" dialog. After about 20 hours of waiting, I cancelled and that also seems to hang. Can ...