Questions tagged [external-disk]

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

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Not Admin | Firmware password error | Recovery Mode wont boot

This probably sounds pretty sketchy, so I’ll preface my question with a brief run down of how I got here... Pretty sure I was hacked... It’s a mid-2012 running High Sierra on a SSD harrdrive. ...
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Samsung X5 external SSD not recgonized

I'm having trouble getting macOS Mojave to recognize a Samsung X5 external SSD. When I plug the drive in, it lights up, but the OS doesn't seem to see it. I've plugged the drive into a Windows PC ...
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Unable to open Seagate HDD in MacBook Air running on macOS Mojave 10.14 (Using Paragon NTFS for Mac)

Please advise on how to open the HDD again. This previously worked fine and also HDD works on Windows 10. I am using Paragon NTFS for Mac to read the HDD.
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External hard drive not mounting

I have an external hard disk drive that's a few years old and lately it's been causing some issues. It started by unexpectedly unmounting, and a few days later it wouldn't mount at all. If I open Disk ...
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Certain files greyed out in external HDD

My question is the same as this one from 5 years ago. I have an NTFS external hard drive and certain files on it are greyed out and can't be opened until I run certain commands on the command line. ...
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Time Machine: Backups.backupdb uses way too much space when copied to another volume

I'm in the process of copying my TM backups to another volume. I followed these instructions: formatted the new volume, set the permissions, disabled automatic TM backup and dragged Backups.backupdb ...
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1answer
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How to restore external hard drive from Time Machine backup the right way?

My Time Machine backup (6 TB USB-HDD) contains the data from my Mac's internal hard drive (2 TB) and from an external hard drive (USB 4 TB, Mac OS Extended, FileVault Encrypted) that I always keep ...
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Why does Apple not recommend storing your iMovie library on an external drive?

I want to try keeping my iMovie library on an external drive because I use both my Imac (at home) and my MBP (when traveling) to edit my videos. Ideally, I would like to use a SD card so that it ...
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Why is my iMac able to write to an NTFS external drive but not my MacBook Pro

My iMac (standalone desktop running Mojave) which is formatted as APFS is able to read and write to my Seagate external drive (which is formatted as NTFS). Yet my MacBook Pro (which was formatted as ...
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How do you disable fsck_exfat from automatically running when you plug in an external drive? [duplicate]

If you plug in an external exfat hard drive that the system considers "dirty" for whatever reason, it will not mount it until fsck_exfat is finished repairing it... which never ever ends so it ...
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How do I download all iCloud Drive files to external hard drive?

Using Google Chrome, I am trying to download or copy + paste all of my files to an external hard drive so I can delete them afterwards and downgrade my iCloud drive subscription to something cheaper. ...
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Is there a way to go back to a previous state of an APFS Partition on an external drive?

My question sums it up. I would like to go back in time on a partition on an external drive which is formatted on APFS. Decrypting a VirtualBox image, VBox crashed (as it does all the time in Mojave) ...
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Why can't I copy a drive in full to another drive?

I am trying to copy one drive to another (both external) - from a 1TB to an empty 4TB drive. I reformatted the 4TB drive, and here is its information: $ sudo newfs_exfat -N /dev/disk3 Reformatting ...
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OWC Envoy Pro Enclosure [with OEM SSD] MacOS Upgrade Problem

I have an Envoy Pro Enclosure (OWCMAU3ENPCIECS / OWCMAU3ENPRPCIU) [w/ OEM SSD - 512GB Mid-2015 Macbook Pro Retina SSD] that I use as a bootable external MacOS installation and it works fine. I have ...
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Mojave install failure “OSIInstallElement failed, Failure Reason: PKInstallErrorDomain:112”

I'm trying to install Mojave on a brand new 2TB Western Digital external hard drive. I've formatted the drive as APFS. The installer gets partway through, and then fails with macOS could not be ...
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External disk is hijacked by fsck when plugged in to Macbook

External disk (2 TB Seagate) is captured by fsck when plugged into a USB 3.0 port on my Macbook Pro (macOS Mojave 10.14.5). This has been discussed by @ArielAllon, and indeed, when I kill the fsck ...
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Nano Memory card does not show up in Finder nor Disk Utility

I have a Nano Memory card working fine. I know it's fine because it contains a bootable ubuntu OS that is being used in a Raspberry Pi. When I plug it to my Macbook Pro (Mojave 10.14.5) it does not ...
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1answer
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Why does unplugging a drive lead to data loss when moving files?

I did a cut and paste (Comd+C then Comd+Opt+V) on my Mac 10.14’s Finder to move some .mov files from my internal SSD to my WD My Passport External Harddrive. Alas, after a while, I move my Macbook ...
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Unable to mount my WD Easy Store 4TB [duplicate]

I am unable to mount my WD Easy Store 4TB on my Mac. I am using macOS Mojave - 10.14.5. I tried several commands using terminal to unmount, but all in vain. It shows ejected but still shows in ...
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Data loss due to lost connection when transferring to External HDD - are they on the HDD actually?

I did a cut and paste (Comd+C then Comd+Opt+V) on my Mac 10.14’s Finder to move some .mov files from my internal SSD to my WD My Passport External Harddrive (connected by USB 3.0 with a USB-C to USB ...
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Sharing and Permissions - always shows “Fetching” instead of the user name

I am a basic Mac user, so please bear with me. I have a WD MyCloud EX2 to store large files and videos - over 10000 files, so searching is critical for me. The WD NAS, the iMac are connected via ...
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Why is my external hard-drive is not appearing (most of the time)

I recently bought an external hard-drive, Western Digital 4GB, and I have a MacBook-pro 2015 (15inch). When I received the hard-drive, it worked like a dream, I just re-formatted it to apple's file ...
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Daisy chaining two external HDD

I have two Glyph 1TB external HDDs connected to my Oct 2015 iMac, 27” 5K display, Fusion HDD, OS 10.14.5 1 has a single partition and is devoted to TM backups The other has two partitions: one ...
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Cannot install macOS Mojave on external spinning drive. Error: This Mac can only install macOS on APFS-formatted drives

I am using the Install macOS Mojave.app installer on my Mac mini (2018) running Mojave 10.14.5 to install Mojave on a formatted external spinning disk laptop drive (a Toshiba model with case). I ...
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Tool to objectively test performance various external drives on my Mac via USB & Thunderbolt

I would to test the relative performance of various external storage devices: Thumb drive Samsung MUF-256AB/AM FIT Plus 256GB - 300MB/s USB 3.1 Flash Drive (256 gigs) Spinning metal drive Toshiba ...
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Partition external SSD (Win10 already installed) for Mac

My situation: I successfully installed Windows 10 on a Samsung T5 external SSD (size of 1TB) which I can boot into using my MacBook Pro 13" (2017 model w/ 4 Thunderbolt 3 ports). Under Windows, the ...
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596 views

Why is my external HDD active when I'm not using it?

I have a partitioned external HDD (orange LaCie), with one partition for Time Machine. All partitions are Mac OS Extended (Journaled, Encrypted). The HDD is GUID Partition Map. I'm not (consciously) ...
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1answer
108 views

APFS on external drive missing from Disk Utility

When I use Disk Utility app in macOS Mojave to format an external drive, I do not see the new Apple File System (APFS) offered as a choice of format. Does it matter that my external drive is a ...
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EHD has 5 TB capacity but Finder only shows 600 GB

I have a Seagate 5TB external hard drive. Disk Utility shows 5TB, but when I click "Get Info," it only says 602 GB. How do I fix this? My Macbook runs on El Capitan. Thanks.
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Make Mac eject external drives when going to slumber or sleep/wake

I have an external drive, a "Western Digital My Passport for Mac". I usually leave it connected and walk away from my MacBook Pro. The Mac often went to slumber and many times the "not properly ...
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50 views

External disk does not show in “diskutil list” after premature eject, what can I do?

This question is related to External drive does not mount after plug off without eject, but the difference is that in my case, the drive did not appear in the Disk Utility application nor in diskutil ...
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External Disk, extended journaled with password, suddenly starts without password query

my External DiskLaCie hard drive D2 Quadra USB3, extended journaled with password, appears on the screen the next morning without a password query. On my MacBook Pro and on the hard drive no updates ...
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Seagate Backup Plus 5 TB became unresponsive after long period of use

I recently purchased a new Seagate Backup Plus 5TB for data use, because none of my drives are functioning properly. My old Seagate Expansion 2TB hard drive failed ("Unable to repair"); the Seagate ...
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Once backward conversion of encryption has started, can it be stopped?

I have accidentally given my external Extended journaled hard drive (with password) the command to "decrypt" the disk. When you restart the decryption starts immediately on the external, how can you ...
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Mount a previously internal and encrypted HDD as an external drive

I upgraded the hard drive on my late 2015 iMac from the fusion drive that came with it to a 1TB Samsung SSD. My SSD has a fresh install of macOS and I planned on using my fusion drive as an external ...
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I have two bootcamp partitions but not my original 500GB

I have a mid 2014 MacBook Pro running Mojave. I recently tried to dual boot windows on my MacBook but in the process corrupted my original Macintosh HD and am left with a 85GB bootcamp partition. I ...
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External HD (Time Machine) sleep issues

I have a 4TB WD external hard drive with three partitions on it, one being a Time Machine partition. When a Time Machine backup is running and the computer goes to sleep, it triggers a few different ...
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128 views

Windows 10 on external drive through boot camp

I've installed Windows 10 on external drive (SSD through USB) on a previous Macbook pro and it was working fine. I bought a new one now, but that same external drive doesn't boot anymore. Instead it ...
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212 views

unable to find Paragon NTFS for Western Digital(WD) external drives

I have had Paragon NTFS 15's free version for Western Digital Drives. Just like Seagate offers. Somehow I had to erase my MacBook Pro and the software has been deleted. So now I am unable to find it ...
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external pendrive is read only

When i plug my external pen-drive(FAT32) in macbook pro(OS: Mojave) it is getting detected but nothing can be copied on pendrive. Seems like there has been some restriction on my office mac so that ...
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Are USB ports on a Thunderbolt dock inherently more reliable than USB ports on a USB dock?

This question refers specifically to the use of external 2.5" drives, spinning or ssd. External drives on usb hubs we all know are very flaky, even for powered hubs. Surprised I couldn't find an ...
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Unable to view Trash on APFS-formatted external drive

I am on macOS Mojave running iTunes with its library stored on an external drive. Both my main machine and external drive are formatted in APFS. When I delete a song on iTunes, the file never gets ...
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MacBook Pro: Erratic Trackpad behavior when an external 3.5" drive is connected

When I plug my external 3.5" hard drive into my 13" 2016 MacBook Pro, the Trackpad becomes very erratic and difficult to use. The drive is housed in a powered enclosure (brand Integral). Other ...
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A WD hard drive can be detected by one Macbook but not another

A WD My Passport hard drive (bought in 2016-7) can be detected by one Macbook (a 2018 15" MacBook Pro) but not another (not even in diskutil) (a 2013 11" Macbook Air). What is the explanation for this?...
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macOS Mojave Command line: How to mount drive but NOT EFI and hidden partitions

If I connect a external GUID-Formated Mac Drive, the Finder does mount all partitions except the "hidden" ones EFI and if existing "Recovery HD". That's fine so far. If I unmount the disk in the ...
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8T external HDD failing to format

Disk Utility is failing to format an 8T external hard drive on my iMac. I keep getting an error stating Unable to write to the last block of the device: (see below): How might I troubleshoot this?
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if external disk found by terminal applescript

Hey so MacBooks have this nasty habit of not mounting external disks when plugged in before... reference link the solution is quite simple with terminal eject the disk and the manually unplug replug ...
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263 views

How to recover Mac Startup Security Utility?

To boot up with external disk, I launched into a startup security utility. The standard startup security utility shows the menus like above. But my startup security utility only shows the Firmware ...
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1answer
49 views

iMac runs from external SSD. How do I use Time Machine to back up the external SSD to the internal HDD?

I am using an external SSD as my iMac boot drive, and that is terrific. I want to back that up using Time Machine and have the back up on my old internal HDD in the iMac. How do I do it?
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External SSD drive not detected as SSD drive

I've got a Sandisk Extreme SSD drive as an external drive for my MacBook Pro. It has no problems with connecting to the MacBook or being recognized as an external drive. The problem is it is not ...