Questions tagged [external-disk]

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

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43 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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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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1answer
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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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1answer
2k 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
192 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
262 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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383 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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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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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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49 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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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
55 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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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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209 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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786 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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1answer
98 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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640 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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1answer
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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
119 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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394 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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726 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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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 ...
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648 views

Is there a way to get macos to recognize my external hard drive without rebooting the operating system?

I have a 4TB external drive connected to my 2015 macbook pro. It has 2 2TB partitions. I use 1 for time machine backups and the other for other files. From time to time when I plug it into the USB ...
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42 views

Recommendations for networking an encrypted OSX Extended format drive

I have a 2TB external USB drive. I formatted it using OSX Extended encrypted. I'd like to have it available on my local network preferably without having to have it permanently connect to one of my ...
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1answer
42 views

How do I move a folder and contained files in an external volume to another external volume using Terminal

I have two drobos. I want to move a folder (called A) from one drobo name (Behemoth) to another drobo (Galactus) using Terminal (Mac). I have tried ditto ~/Volumes/Behemoth/A /Volumes/Galactus/ but ...
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1k views

Brand new external hard drive formatted exFAT is mounted read only

I bought a new HDD, formatted as exFAT with mac. I moved files from my laptop to the HDD (moved, I mean, I also deleted them). It happened with a directory it got stucked. I quit the process of ...
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2answers
3k 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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How do I copy files from macbook to external harddrive using single user mode?

My MacBook pro shut down due to an error, and now I can't log in again. I've tried creating an image using Disk Utility but it fails every time. I have my hard drive connected to my MacBook but when I ...
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1answer
501 views

Use an external disk shared to Mac via Windows for Time Machine

I have an external hard drive with 3 partitions partitions a exFAT connected to a Windows 10 PC. I am able to mount and access the disks on my Mac wirelessly but cannot get TimeMachine to use this ...
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Finder thinks there are many nonexistent volumes named “m”

I have a clumsy but mostly working AppleScript that ejects all partitions on one of my external drives except for the partition called Data OWC4_500. The first commands in the script are tell ...
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1answer
67 views

Back up other drive using Time Machine

I'm trying to diagnose & fix some problem on my MacBook Pro - the machine randomly hard-crashes instantly & shuts down. I have a somewhat-old Time Machine backup of the drive on an external ...
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2answers
164 views

Using iCloud as file storage and synchronization service

I am considering to choose iCloud Drive vs Google Drive to store old music and photos folders present in external drives. Is it possible to upload large folders to iCloud Drive that are not present ...
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1answer
2k views

“Permission denied” when running macOS installer from command line

I'm trying to install High Sierra to an external drive, from a system which is running Mojave. I can't run the GUI installer (it warns me about trying to install an older version of the OS), so I'm ...
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1answer
29 views

Backing up another user’s mid-2013 Macbook Air

I have pretty much been a Windows user all my life but a family member has recently given me his mid-2013 i7 Macbook Air. This machine is logged in with his Apple account (I have the credentials) and ...
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2answers
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How can I recover a Mac-formatted external hard drive?

My girlfriend has an external hard drive with a bunch of photos on it from her Mac. She needed to transfer the files to her PC but we soon discovered that Macs and PCs use different formatting ...
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1answer
2k views

Best practices to move macOS Mail.app storage to an external drive?

I have a system with fairly small internal storage (500GB) so I have attached a reasonably quick external storage device (256GB) that will be constantly mounted. To free up space on the internal ...
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1answer
263 views

External hard drives keep failing

A couple years ago, I learned my lesson. I had bought a WD My Book Thunderbolt external RAID. I didn't have a backup plan of course; it failed within a year, and I lost everything—this was about a ...
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3k views

Can't write to Seagate external hard drive on other macbook pros

I have a "new" 2gb Seagate external hdd. I used it to copy files off of my old Macbook pro, circa 2014, which worked fine. I just plugged in the drive into my new Macbook pro, circa 2018. I can ...
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190 views

Why my Mac Mini doesn't boot with external HDD attached?

Ext HDD is 3,5" 4TB WD RED (exFAT) in USB 2.0 box with external power supply (220v) When I restart my Mac Mini (late 2012, MacOS 10.14) in 90% the boot will end on black screen (no apple loading logo,...
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441 views

Installing modern OS X version on 2013 with external SSD and missing OEM internal SSD

Background: I have a mid-2013 MBA I was given a couple of years ago without its SSD. I used it with an external USB 3.0 HD and upgraded the OS each new version up to Sierra, but could never get High ...
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1answer
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External disk automatically reconnects after unmounting

I have a weird problem on my 13" MBP (Early 2015) running MacOS 10.14.3 Mojave. I have an external USB disk with a MBR partition scheme and one big exFAT partition that allows me to exchange files ...
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1answer
564 views

How do I resolve a non-unique HD Identifier problem?

I use a HD with a caddy adapter for saving some files. macOS attributes a unique identifier for each external drive connected. But I needed to swap my adapter for the same disk, and now it's not ...
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2answers
521 views

Recognize externel hard drive as internal

I need my 2018 Mac mini (Mojave) to recognize the external hard drive as an internal one so I can use Bootcamp and install Windows on it. I tried the answer in "How to let MacBook Pro recognize my ...
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501 views

My External Hard Drive's format changed to FAT16 without any reason

I have an ADATA HD710 1TB external hard drive which I use mostly in my Mac Mini 2011 and I have created two separate partitions for my drive. One of the partitions has APFS (Apple File System) format ...
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1answer
8k views

How do I move files to external HD via Terminal?

I am trying to move a couple of folders from my Desktop to an external Hard Drive as Finder is not working. When I type command mount, I get the HD listed, but when I try to use command ls or cp I ...
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1answer
34 views

Macbook Pro can only startup with external hard drive connected [duplicate]

Here are the facts: 13 inch, mid 2012 It gave me the grey screen with the flashing question mark folder one day, and I got an external hard to install the MAC OS X operating system like the apple ...
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391 views

My Passport Ultra transfer speed

I bought this device to replace an older HP external drive. This WD drive comes with a USB 3C cable and a USB 3 adapter. Im using it on a MPB - USB3 port. WD will only give me "theoretical" speed ...

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