Questions tagged [external-disk]

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

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Data loss due to lost connection when transferring from Mac 10.14 SSD to External HDD [on hold]

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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20 views

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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Is it okay to send in external HD encrypted with FileVault for replacement? [closed]

I have a Seagate external HD that I just bought 2 months ago. Yesterday, it crashed and I cannot access it at all. I'm sure it's hardware related because I can hear a clicking sound coming from the HD....
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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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37 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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342 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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579 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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29 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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1answer
15 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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1answer
39 views

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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1answer
19 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
15 views

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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1answer
26 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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76 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
65 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
27 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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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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1answer
25 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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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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1answer
22 views

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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69 views

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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1answer
93 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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38 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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1answer
36 views

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 ...
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103 views

External HDD keeps ejecting by itself from MacbookPro 2018

I have a 2018 Macbook Pro and am trying to connect an Icydock external HDD (in raid 1 configuration). This external HDD connects without any problems to my older 2014 MBP. On the new MBP, it is ...
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1answer
35 views

How can I mount a thumbdrive to my iPhone?

I have a jailbroken iPhone 6s running iOS 10.3.3. I'd like to be able to connect a r/w thumbdrive to my phone, but I don't know what kind of adapter I'd have to buy/make. Does anyone have any ...
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29 views

Cannot mount external drives or flash drives

I tried multiple file systems and multiple devices, none of them will mount. I also tried looking for fsck (not running), resetting the NVRAM (and restarting the Mac of course) and it still doesn't ...
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1answer
32 views

Transfer time machine backups from unmountable HDD

I am attempting to access time machine backups on an external hard drive that I have, and transfer them over to a new HDD. Both drives are 2TB. The drive with the time machine backups will not mount, ...
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2answers
317 views

Multiple “Disk Not Ejected Properly” messages shown after waking from sleep

I am getting tons of (about a hundred) “Disk Not Ejected Properly” notifications/messages for two external hard drives (one drive has one partition, the other has two partitions). I'm running Mojave ...
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1answer
31 views

Using external NTFS drive from windows on mac with bootcamp

I am new to StackExchange so please pardon, if my request does not follow all best practices. My dad uses Windows 10 on a MacBook pro 2015 via Bootcamp. His backup data is on an external NTFS hard ...
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1answer
21 views

Lacie External Hardrive doesn't show up on Mac or in Disk utility

My lacie hard drive was making some strange clicking noises when I put it in my mac. I have also tried this in a PC. It now is just not showing up in the devices and also when I try to access it in ...
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3answers
89 views

External HDD No Longer Accessible (ExFAT formatted)

I have an external HDD Toshiba MQ01ABD100 1TB HDD in an external enclosure. Recently it suddenly no longer accessible. When plugged to a Mac, it will prompt "The disk you inserted was not readable by ...
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Can't update to Mojave with an external SSD

I have a 2014 Mac Mini. I've seen a number of these issues but haven't found anything that could help. When trying to upgrade to Mojave, I get: you may not install to this volume because the ...
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127 views

MediaKit reports bad partition or no map found (-5324)

I am trying to recover an external drive (Western Digital, MyPassport, 4TB, WDBYFT0040BBK-0A) formatted in HFS+. /dev/disk0 (internal, physical): #: TYPE NAME ...
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Moved home-folder to external drive - after booting up Apps sometimes won't load

Bid on an 2018 Mac Mini on Ebay, when I realized that this impulse buy is an error (128GB internal drive) it was already too late. Solved that problem by moving my Home-Folder to an external ...
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1answer
94 views

Large external storage stops working after being connected for a long time

I have a 4 TB LaCie RUGGED USB-C external hard drive, and when it's connected to my MacBook Pro (13-inch mid 2014) for a long time without being used, it stops working. I do allow drives to sleep when ...
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151 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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35 views

My WD passport spins, lights up and connects but doesnt show as an available drive [duplicate]

My external hard drive fell. After that I plug it in and it lights up but doesnt blink, the HD spins then stops. The WD icon in the top right of my screen shows it there as plugged in but it doesnt ...
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1answer
103 views

How to ignore Spotlight index for a volume contain another macOS

Volume A: macOS A Volume B: macOS B How can I ignore Spotlight index of Volume B when using macOS A, while keeping index data and use index when switching to macOS B.
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88 views

Bootcamp HDD is now in a USB3 external enclosure. Can I boot my iMac from it?

I installed windows 10 on my iMac with bootcamp and it worked great. I have since upgraded to an SDD and the old hard drive is now in a usb 3 enclosure. I'd really like to be able to boot from that ...
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586 views

How does the mv command work with external drives?

On the same drive I assume it would change something like a FAT table to repoint to the location of files. Question When going to a different drive (maybe even partition) does the mv command first ...
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1answer
38 views

Mount external disk at the same mounting point in macOS

I have an external disk, and I want to be mounted in the same mounting point (path) every time I connect. In ubuntu I edited the file /etc/fstab, I added UUID=5C2A-23AD /media/external1/ exfat ...