Questions tagged [external-disk]

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

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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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Are Time Machine backups to an external disk attached to a Time Capsule supported?

My 1 TB Time Capsule drive is full with Time Machine backups. I'd rather spend $130 on a 3 TB drive than $500 on a new 3 TB Time Capsule. Is an external drive attached to a Time Capsule supported ...
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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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2answers
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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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20 views

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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2answers
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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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How can I write-protect (make read-only) a USB drive in OS X?

I have a USB drive with some archive data on it that I'd like to access from a Mac running Snow Leopard. However, I want to ensure that the data on the drive is preserved and no modifications are made ...
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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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2answers
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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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28 views

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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25 views

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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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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536 views

Disk ejected but still show up in Disk Utility?

I have this external (USB) drive that can't seem to be disconnected correctly. Whenever I eject the drive, it won't disappear from Disk Utility. Afterwards when the drive gets re-connected again, it ...
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1answer
33 views

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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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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1answer
88 views

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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2answers
378 views

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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3answers
593 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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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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1answer
50 views

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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1answer
97 views

Strange situation in making backup on an external disk

As the screenshot above shows, tonight, while trying to make a backup of the files on my Mac OS X, Version 10.7.5, Processor 2.4GHz Intel core i5, Memory 4 GB 1333 MHz DDR3 laptop computer, I got this ...
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180 views

exfat fsck crash on macos 10.14.4. Any workaround or fix?

I am trying to mount an external HD with exFAT, but apparently the latest unmount was non-successful, and now the disk requires an automatic fsck. When macos tries to perform the fsck, this happens ...
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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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2answers
3k views

How to recover a corrupted external exFAT hard drive

This is a 3 TB external Seagate hard drive formatted in Mac's Disk Utility as a single non bootable exFAT partition. It got unplugged from the computer and now the computer is unable to read it. sudo ...
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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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1answer
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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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1answer
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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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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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The volume can't be ejected because it's currently in use

After working with an external USB backup disk I want to cleanly unmount the drive. When pressing the 'eject' button Finder warns me with the message: "The volume can't be ejected because it's ...
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2answers
716 views

Slow read/write speed (40MBps) with USB-C external SSD on Macbook Pro

I had a Sandisk Extreme Pro 500Gb PCIe NVME M.2 SSD. I got an USB-C 3.1 Gen 2 Enclosure for it. I have tried it on 3 different 2017 and 2018 macbook pros and an iMac. The Max read/write speed that I ...
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1answer
677 views

My Seagate 4TB HDD doesn't mount in OSX El Capitan

My Seagate 4TB HDD doesn't mount in OSX El Capitan on my MacBook Retina. I have been using it for the last week on this computer, but today it doesn't mount. It shows up in Disk Utility, but when I ...
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1answer
24 views

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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1answer
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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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2answers
22k views

Mount FAT32 partition (external drive) on Mac

I have an external disk drive of 2TB with two partitions, one NTFS and another with FAT32 format. The NTFS partition is automatically mounted when i plug the device using Paragon NTFS but I don't ...
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118 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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1answer
191 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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1answer
33 views

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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24 views

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 ...