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Questions tagged [external-disk]

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

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1answer
31 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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0answers
15 views

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 ...
4
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1answer
5k views

How to merge two partitions on external hard drive when the “partition” option is greyed out?

I have an external hard drive that is connected to my computer by a SATA/eSATA cable. Diskutility recognizes the hard drive as two separate drives as shown in the following two images: I can't seem ...
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0answers
22 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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0answers
15 views

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
87 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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1answer
51 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 ...
2
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1answer
592 views

Connect an external SSD (USB Type-C) to Mac Mini (mid 2011)?

I have a Mac mini (Mid 2011) and I want to use an external SSD (Samsung Portable SSD T5) with it. Now the problem is that Mac mini (Mid 2011) only has: Thunderbolt port (up to 10 Gbps) (not ...
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1answer
20 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 ...
2
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1answer
92 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.
3
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1answer
239 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
38 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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44 views

Time Machine won't be able to backup to my external HDD

My Info device: macbook pro 2018 13' os: Mojave (version 10.14.3) backup device: WD my passport 2TB partition map: GUID Partition Map partition name: backup (format: mac os extended(...
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1answer
27 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 ...
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2answers
519 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
83 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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1answer
18 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
28 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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1answer
37 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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1answer
41 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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0answers
11 views

Lost connection to NTFS external drive in the middle of use, now it won't mount

Problem: I was watching a movie through iTunes and 20 minutes in the movie just stops and says it can't find the file location. I recently moved my iTunes library to my external drive, but I watched ...
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0answers
61 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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2answers
22 views

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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2answers
1k views

Deleting of old backups in Time machine

I have WD-My book world of 1TB and I struggled for some time to set it up correctly to use it as a disk for usage of time machine on Mac OS X Yosemite. My question is the following-what is the best ...
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8answers
65k views

How to view progress when encrypting a disk?

Mountain Lion allows one to encrypt any disk by right-clicking on the disk in the Finder and selecting Encrypt from the contextual menu. Is there anyway to check on the progress of this encryption ...
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0answers
25 views

Can't reboot on external SSD with Bootcamp

a few months ago I bought a new Mac, since this machines are so pricy, I ended up buy a basic model with a small SSD and only 8GB of RAM, for this reason I have been trying to avoid running Windows ...
2
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2answers
3k views

Changing the Finder icon for an external disk formatted as ExFat?

I used this web page recipe - Create Your Own Custom Icons in OS X 10.7.5 or Later - for creating a .icns icon set containing a set of icons for an external disk that has been formatted with the ExFat ...
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8answers
24k views

WD Passport Ultra can't mount on Mac, flashing lights, but can be read on Windows. What is broken?

Update: After about 3 weeks. I plugged in again into my MacBook and left it there. After more than an hour I came back and the drive showed up on my Mac again. (So somehow the problem got fixed.) I ...
3
votes
1answer
27 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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0answers
15 views

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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2answers
38 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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5answers
35k views

USB Flash drive not mounting OS X

Some months ago I bought a USB flash drive 16 GB, and I have used it on my Windows machine with no errors or bugs, whatsoever. Since that I need to move some files from my Mac, the flash drive does ...
1
vote
1answer
34 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 ...
1
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2answers
5k views

How to remove the use of master boot record from an external hard drive?

I have a 1TB external hard drive and I want to slice it into different partitions. When I try to do so, I get this error: can not modify external drive because it uses master boot record Is there ...
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1answer
18 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 ...
1
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2answers
74 views

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 ...
2
votes
1answer
140 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 ...
4
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7answers
32k views

Unable to mount Time Machine partition

I have a WD external HDD which is plugged into my MacBook Air more or less all the time; it has two partitions one of which is my Time Machine disk. Just today I noticed that the hard drive is not ...
2
votes
1answer
32 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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1answer
120 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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1answer
20 views

Can't update boot security on new Macbook Pro

I am trying to boot from an external device and it is asking for an administrator password. The machine is new and didn't have a password so I created an admin password and it still won't allow me to ...
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2answers
80 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 ...
4
votes
1answer
96 views

Why does my Time Machine external drive unmount overnight after upgrade to Mojave?

I use a LaCie Quadra RAID drive as my Time Machine drive. It's directly connected to the USB socket on my iMac (Retina 5K, 27-inch, Late 2014, macOS 10.14.1). It's been fine for years. It may be a ...
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0answers
16 views

cloning external 1TB HDD to internal 500GB SSD

2015 iMac, non-retina, OS 10.13, to remedy bad data transfer, SSD can be totally erased external HDD OS 10.14, 200GB total used, this disk was "professionally" replaced yesterday with the SSD but ...
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1answer
30 views

macOs High Sierra External Hard drive problems

I have a Toshiba DTC810 external hard drive that was working properly for almost a year. Then, suddenly, yesterday I plugged the drive into the USB port and it wasn't working. I tried to plug him into ...
3
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1answer
3k views

Partition on HFS+ external drive: “Invalid number of allocation blocks”, file system check exit code 8. Unable to repair, even in recovery mode

As the title says, I'm getting the error "Invalid number of allocation blocks" on a particular HFS+ partition of an external drive. I am unable to repair, even in recovery mode. Log results when I ...
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1answer
76 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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0answers
23 views

Reinstall vmware fusion and vm cannot run

First I explain why I reinstall vmware fusion: ubuntu on vmware fusion cannot detect my external hard disk. This forum tells me to reinstall the vmware fusion while my security is unlocked(for more ...
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2answers
15k views

Can I get S.M.A.R.T. support on external hard drives?

Disk Utility reports the S.M.A.R.T. Status as not verified for external disks, and by default Mac OS X only seems able to access S.M.A.R.T. information on internal hard drives. Is there a way to get ...
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0answers
90 views

How to mount FAT32 partition on MBR disk containing a logical Linux partition

I have a USB stick which contained a single FAT32 partition and was working fine. Then I ran the Ubuntu Server 18.04 installer, shrinking the partition and adding a logical Ext4 partition to install ...