Questions tagged [external-disk]

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

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61 votes
12 answers
168k views

Is it possible to use Boot Camp with Windows 10 from an external HDD?

I need to run Visual Studio on my MacBook Pro and I need Windows to do that. The easiest and well known way to install Windows on a Mac is by running the Boot Camp app on the Mac and let it do what's ...
Matt's user avatar
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5 votes
2 answers
12k views

Drivers not working on Windows 10 installed (CLI process) on external SSD running on MacBook Air 2018

I have a problem with the installation of Windows 10 (November 2019) on my MacBook Air 2018. I tried to use a virtual machine the first time, but some drivers did not work (trackpad, audio and ...
Alessandro Pani's user avatar
2 votes
1 answer
1k views

External Hard Drive no longer working

I am on a MacBook Pro 13 running latest Sierra. I have an external Seagate solid state hard drive that was working and out of the blue stopped working. The only thing on it was my Adobe Lightroom ...
Byron Mansfield's user avatar
35 votes
7 answers
119k views

What is the best way to clone a disk between two Macs?

What is the best way to clone a disk between two Macs? I ask this every couple years or so and every time I get the same answer. "Use Carbon Copy Cloner", they say. But the unfortunate fact is that ...
erotsppa's user avatar
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62 votes
7 answers
74k views

How do I disable this message: "the disk was not ejected properly"?

Is there any way to disable the "the disk was not ejected properly" message? I use a KVM and need to switch between two systems and have a memory stick that is in the KVM. The problem is that it's ...
Sindre Sorhus's user avatar
30 votes
15 answers
352k views

How can I repair a disk that Disk Utility says it can't repair?

I have an external hard-disk with a single Mac OS Extended partition. This disk stopped working couple of days ago. I tried to repair the partition with disk utility but no luck. The error message is ...
gyurisc's user avatar
  • 1,559
78 votes
9 answers
146k views

External drive does not mount after plug off without eject

I accidentally unplugged my hard drive without properly ejecting it, and now the drive does not mount when plugged in. What can I do to make it work again? I can see the disk in lsusb and diskutil ...
Charles's user avatar
  • 911
54 votes
13 answers
167k views

Can't mount exFAT external drive in macOS

I have a Western Digital MyBook (25EE) 8TB External Drive. It is formatted with exFAT. I can't recall exactly how it was formatted, but I believe it was done with Synology's DiskStation for my ...
P A N's user avatar
  • 9,814
17 votes
2 answers
9k views

Can you make OSX mount just certain partitions when you connect an external HDD?

I have an external HDD with 4 partitions. My question is the following: is there a way of telling the OS to mount just two of them (One FAT and one HFS+) when I connect the HDD? It is rather annoying ...
kevin9794's user avatar
  • 4,310
7 votes
5 answers
25k views

Enabling Time Machine for a USB HDD with NTFS

When I've plugged in my USB HDD (WD Passort Elite) for the first time, the system had asked me whether I want to use this HDD as time machine drive. I've chosen smth like 'decide later' and continued ...
knuku's user avatar
  • 1,271
4 votes
1 answer
1k views

Accidentally ejected External drive while downloading file, now having problems reading

I'm hoping someone can help! I recently downloaded a torrent directly onto an external hard drive, (using a 2009 MacBook Pro and 1TB Seagate Expansion portable Drive) somehow during the download the ...
Gearoid Óg's user avatar
80 votes
12 answers
96k 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 ...
ericg's user avatar
  • 1,608
22 votes
9 answers
11k views

Limit Time Machine size in Big Sur

In setting up a new Time Machine, how can I limit how much disk space Time Machine has access to? I am only interested in answers relevant to Big Sur's change to AFPS for Time Machine. Before 10.13, ...
Unrelated's user avatar
  • 555
6 votes
2 answers
990 views

Time machine restore to new external drive

As you read through this post, for reference, the machine on which I'm trying all of this is running Big Sur. I was using Time Machine to back up an external drive that failed. Having purchased a new ...
Christoph's user avatar
  • 163
3 votes
1 answer
20k views

Fixing my external hard drive's partition map

Okay, so something really strange has happened, and it's a doozy, so please bear with me. Problem: I need to fix my hard drive's partition map So let me fill you in on what happened here. I have an ...
Liftoff's user avatar
  • 189
3 votes
1 answer
3k 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 ...
adib's user avatar
  • 1,313
1 vote
3 answers
3k views

After update, now I'm getting "Disk not ejected properly" every time my Mac sleeps

Been running El Capitan since it was officially released. Updated to 10.11.4 a few days ago. I have a WD Elements USB 3.0 drive connected to my Mac mini (directly to the rear ports, not via a hub). ...
general exception's user avatar
0 votes
3 answers
390 views

Is there an easy way to automatically schedule a move of files matching a certain pattern from a user directory to a USB drive?

I'm looking to automate a backup process that involves transporting backup files (with names in the form "*.savf") first onto a Mac Mini (running Yosemite), and then, once they're on the ...
hbquikcomjamesl's user avatar
71 votes
9 answers
54k views

How can I skip the Trash when deleting a file?

I frequently connect different external USB hard drives and flash drives to my computer and I would like to facilitate deleting files and regaining disk space from them. If I simply delete the file, ...
Redandwhite's user avatar
  • 3,087
19 votes
5 answers
20k views

Prevent Spotlight from indexing external drive

Sometimes I use an external drive with macOS on it. This is in conjunction to my current internal drive which also is running macOS. I find it annoying that, whenever I search for something (such as ...
Oion Akif's user avatar
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14 votes
4 answers
21k views

Relocating /Users folder in MacOS 10.15 (Catalina)?

In the past when we wanted to offload the /Users folder from the internal disk we simply created a symbolic link for /Users that pointed to /Volumes/External_Drive_Name/Users. The Mac in question is a ...
Mr Rabbit's user avatar
  • 17.7k
5 votes
1 answer
7k views

Is it possible to backup iOS devices to an external drive?

I have a new Mac Pro with a small 256GB SSD. I have a larger 2TB drive that I run backups to. My girlfriend has a MacBook Air with a tiny 128GB SSD. Our problem is our iPhones have 50GB of music, ...
Frank Visaggio's user avatar
4 votes
2 answers
3k views

iTunes videos on a different harddrive?

since the TED HD podcast and iTunesU my iTunes library is getting bigger and bigger and thus free space on my MacBook HD smaller and smaller. I'm getting an iPad2 soon and would like to sync my TV ...
Patrick's user avatar
  • 1,351
4 votes
2 answers
25k views

How to enable NTFS 3G? [duplicate]

It is a common issue Mac users, when you try open NTFS external storage you allowed only read mode. And of course there are some solution. One of them it is NTFS 3G - free alternative. I followed ...
Sirop4ik's user avatar
  • 970
4 votes
5 answers
3k views

Shortcut to eject all external hard drives but not MobileBackups

So far I've been using the following AppleScript to eject all external drives at once conveniently using a shortcut: tell application "Finder" eject (every disk) end tell This script is ...
gentmatt's user avatar
  • 49.7k
4 votes
1 answer
3k views

Using an external HD as my applications folder

I need to install more applications - can I use my external HD (samsung T5) and add an additional applications folder? I have loads of space on it and it the speeds are great.
LeBlaireau's user avatar
3 votes
1 answer
5k 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 ...
Jon B's user avatar
  • 127
3 votes
1 answer
2k views

External SSD not being recognized by newer (retina) MacBooks

So I'm in a rather strange situation. I have an SSD, and I am using a SATA to USB 3 adapter (basically an enclosure, as it is called) to connect it to my laptop. This worked fine with a mid-2012 ...
user221524's user avatar
2 votes
1 answer
828 views

How do I replace my smaller Time Machine Drive with a New Drive on macOS Ventura (Encrypted)

How do I format my New Drive and Move the old backups from my Old Time Machine?... Now it would seem straight forward at first with a simple drag and drop from old to new drive, but my old drive is ...
TheArchitecta's user avatar
1 vote
1 answer
3k views

Installing & running OS X 10.8 Mountain Lion from an external hard drive onto my Snow Leopard Macbook Pro?

I am currently running Mac OS X 10.6.8 Snow Leopard on my late 2010 Macbook Pro. I am perfectly fine with running Snow Leopard at present, but I feel I may be missing out on features or indeed updates ...
Simon's user avatar
  • 7,451
139 votes
10 answers
196k views

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 ...
CousinCocaine's user avatar
57 votes
10 answers
159k views

How to eject my external drive when my Mac refuses because of Spotlight?

I have plugged an external disk to my Mac. Now, I want to eject it. But my Mac stubbornly refuses and says that an application may be using the disk. I have not launched any app neither opened any ...
Nicolas Barbulesco's user avatar
28 votes
3 answers
40k 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 ...
Basil Bourque's user avatar
22 votes
7 answers
69k views

What format for my external drive allows use with Mac and Windows?

How can I use my external hard drive on Mac OS so I can modify/edit files on both OS's: Mac and Windows? How should I format it?
makaed's user avatar
  • 379
20 votes
1 answer
145k views

Force mounting an external disk that is not recognized

I recently bought a 4 TB naked (no enclosure) external hard drive that I mount via a Newer Tech dock (the ones where you insert the naked drive like bread in a toaster) and is connected to my MacBook ...
marcnyc's user avatar
  • 471
19 votes
6 answers
11k views

How do I make Spotlight stop indexing my Backup drive?

I have a 2TB external drive I use for Time Machine. At random intervals, it will decide to spin up and my entire UI freezes until it's finished. This is incredibly annoying. It appears that this is ...
Adam Lassek's user avatar
19 votes
13 answers
18k views

How to Eject All External Partitions Quickly?

I have an external disk with two partitions on it that I keep plugged into my MacBook Pro when I'm at my desk. (One is for Time Machine, the other just for extra storage.) Sometimes I need to grab my ...
Jim L.'s user avatar
  • 550
16 votes
6 answers
51k views

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 ...
g .'s user avatar
  • 3,308
14 votes
1 answer
3k views

Can I disable any macOS filesystem cache for USB devices so I can eject them without potential damage to the data?

When I have a USB device like a SD card, USB drive or external hard drive, I always need to unmount it, otherwise OS X complains about the device not being ejected properly. (It’s possible to disable ...
Michael Stum's user avatar
  • 1,700
12 votes
1 answer
31k views

Is it unusual for "Verify Disk" on Disk Utilities to take so long on a Time Machine drive?

I have an external 3TB FW800 drive set up to be my Time Machine drive. I noticed some unusually high drive activity, and opened up Time Machine to see if it was backing up. Nope, TM showed previous ...
johnneese's user avatar
  • 148
11 votes
6 answers
19k views

How to run Applescript on Disk mount

I want to run an Applescript when I mount a specific disk. It isn't if the script is located on the disk or not, it should just run when OS X mounts the disk. I tried to accomplish this with folder ...
jsadfeew's user avatar
  • 1,002
7 votes
4 answers
17k views

APFS with external hard drives (non SSD)

I bought a new external hard drive for my Mac. What is the best file system in 2021 to format the external hard drive? I would like to encrypt the hard drive and I only use it with Macs so I don't ...
T. Walker's user avatar
6 votes
3 answers
9k views

Is it possible to disable auto mount of external devices? [duplicate]

How can I disable the auto mount of usb/firewire devices or basically any external disk in MacOSX? My motivation for this is that in Windows there have been possible attacks via USB trojans that ...
gentmatt's user avatar
  • 49.7k
6 votes
2 answers
15k views

Move macos user home folders on external drive

I got a shiny new Mac Mini but couldn't afford a 1TB internal SSD to hold all my stuff, so I'm testing ways to leverage an external disk for user storage. I know I can point Photos and iTunes to ...
Chris4d's user avatar
  • 160
5 votes
2 answers
9k views

How can I use my iPod touch as an external disk?

I have a 2nd generation iPod touch (8GB), but I don't know how to make it work as an external disk. I think I saw a checkbox somewhere but I can't find it anymore. I've searched the Web, but the way ...
Rabskatran's user avatar
  • 5,757
4 votes
3 answers
5k views

Setting up iPhoto library on external HDD

Is there any way to set iPhoto library on external HDD instead of main HDD. I have a lot of photos and am running out of space on my MBP. I was thinking to achieve it by symlinks or something. It ...
Michał Zygar's user avatar
4 votes
3 answers
3k views

External hard drive very slow to load after dropping it and can't be repaired with Disk Utility

Today as I was using my WD HDD, it fell off my corner. After I fixed the thing, I plugged it into the Mac and it loads the HDD but it's very very very very slow. It also does not work sometimes. The ...
Shane's user avatar
  • 73
4 votes
3 answers
26k views

What's the fastest way to get data off Time Capsule and onto an external drive?

I plugged an external drive into Time Capsule using the USB input on the back. Then I used Finder to move data from the Time Capsule's drive to the USB drive. Finder says it'll take over 24 hours to ...
Andrew Warner's user avatar
4 votes
0 answers
167 views

Disable "The disk you attached was not readable by this computer" for disk [duplicate]

When I enter a USB drive that is encrypted with veracrypt, I get an error message: The disk you attached was not readable by this computer Eject - Ignore - Initialize Which I select "Ignore&...
Jared's user avatar
  • 151
4 votes
2 answers
6k views

Can Time Machine back up an external hard drive in addition to internal one?

I have two external hard drives connected to my Mac with OS X El Capitan. I am using one of the external hard drives with Time Machine as the back up hard drive only. The second external hard drive ...
Gail G's user avatar
  • 41