Questions tagged [external-disk]

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

130 questions with no upvoted or accepted answers
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Stop iTerm2 from using disk (disk cannot be ejected)

How can stop iTerm2 from using the mounted disk I cd'd into? Sometimes, even when i cd out, it's still blocking the disk. I have to ⌘-Q the entire program which is very irritating. It's just idling ...
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133 views

Can I put my Photos library on an external hard drive also used for Time Machine?

So, I am new to Macs, and I have a MacBook Air. I've got lots of phots to import into the Photos program, so I decided to stick them all on an external hard drive. I have also used that hard drive ...
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1k views

Eject / unmount ghost external disk on macOS

I use MacBook Air Mid 2013 (1.3 GHz Intel Core i5, 4 GB 1600 MHz DDR3, Intel HD Graphics 5000 1536 MB, 128GB flash storage) running macOS Sierra 10.12 $ sw_vers ProductName: Mac OS X ProductVersion:...
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Recover data from external hard drive partition Mac OS X

A couple of weeks ago, I dropped my external drive while a program was writing data to it. The drive seems to spin up fine, without beeps/scratches. The drive also has EFI and Recovery partitions. One ...
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386 views

USB Drives not showing up after Mac was sleeping

I am constantly encountering the following problem with my Mac(s). This has been happening with two different Macbook Pros (13" late 2011 and 13" 2017) with numerous MacOS versions, including the ...
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103 views

Directory is not recognised on macOS but works well on Ubuntu and Windows

I have a removable hard drive in NTFS format that is connected to macbook pro through usb. For some reason finder doesn't show one of the directories. First I thought that I removed it by mistake, ...
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646 views

External Hard Drive Corrupted, Invalid Record Count

I have an external hard drive that I unplugged without safely ejecting and now it won't mount. I can see it if I write diskutil list, but when I try to mount it fails. It is a WD My Passport Ultra. ...
3
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0answers
861 views

USB-3 drive ejects unexpectedly while writing large amount of data on it

I have a 5 TB Seagate external drive connected to a 2012 MacBook Pro (non Retina) through a USB-3 connector that always gets ejected while I am copying files to it. When I try to copy large amounts of ...
3
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207 views

External USB3 hard disk not mounting (10.11.6)

I have an external USB3 hard disk which used be my Time Machine backup drive. It is not mounting in Finder, but is showing up if I diskutil list. It sounds like it wants to mount - in fact, it sounds ...
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1k views

How can I repair hdd using Disk Utility if First Aid options (Repair, Verify) are all greyed out?

Would really appreciate any help in fixing an external drive so can use with my Mac again. I had a power loss & when computer rebooted it was unable to see the attached Freecom 320Gig Hdd (FAT32 ...
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165 views

photolibr is preventing my external disk eject

I have my Photos library in an external usb3 disk. Usually, photolibr prevents the disk from ejecting, even if Photos is closed: kukuruzasIII:yoAlcalde_mobile olmo$ lsof | grep DATOS photolibr 504 ...
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1k views

Spotlight says it is indexing an external drive, but actually no search

Spotlight says it is indexing: % mdutil -s /Volumes/TOSHIBA\ EXT /Volumes/TOSHIBA EXT: Indexing enabled. There is a .Spotlight-V100 folder: . ├── Store-V2 │   └── BC758E30-9A07-4193-BEE7-...
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7k views

fsck not working to fix corrupted external drive

I am using an early 2011 MacBook Pro with the Mavericks OS. I've researched a similar issue on an internal drive but As far as I know, being in Single User mode won't help my situation. One of my ...
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278 views

Encrypted External Drive Using Apple's Password Generator and Forgot the Password: Can It Be Salvaged?

I have a partition on an external HD with some Time Machine backups. I decided to encrypt the partition using Finder and used Apple's built-in password generator to create the passphrase. ...
3
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414 views

Raid two external hard-drives with read/write support on Windows & OS X

I have a USB 3 HDD enclosure that currently has two 1TB drives in it. I am looking at buying another external USB 3 HDD drive (not an enclosure). I am currently running the external enclosure with the ...
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17 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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2k views

Mac asks me to run Disk Utility in Recovery, while in Recovery

I have a WD EasyStore Drive, and for some reason it was bugging out with Time Machine today. I decided to run First Aid on the drive and it found a corruption it wanted me to fix via Recovery mode. ...
2
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46 views

Error Code -36 Copying Files from Windows NT Formatted Drive to exFAT Drive (select files only)

The gist of the problem is this: I have a large amount of video and audio footage that I need to consolidate from multiple drives - namely this Windows NT Filesystem formatted Seagate Expansion Drive ...
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27 views

Why am I receiving this error when attempting to unmount external CF card?

Sometimes I receive the following error when trying to unmount an external USB, CF, or random drive: dissented by PID 17728 (/usr/bin/login) I attempted to cd out of the drive directory, and into my ...
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1k views

How do I mount an encrypted disk in single-user mode?

How do I mount an encrypted disk in single-user mode? I tried using one of the answers to “How can I mount an encrypted disk from the command line?”; but when I tried using “diskutil” as suggested, I ...
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498 views

reformat a GPT external HDD to MBR/exFAT

I am currently looking for a solution (if it exists) to change my external 4 TB SATA HD from a GUID Partition Table to an MBR with an exFAT volume. I did not see an already answered solution but if ...
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447 views

External Drive Encrypted Journaled - Show Password Hint

I encrypted an external hard drive using MacOS Journaled Encrypted about a year ago. I'm confident that I was prompted to provide a password hint when I entered the original password and formatted the ...
2
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45 views

Store infrequently used files on external HDD

Is there a utility that enables storing infrequently accessed files from a Mac on an external hard drive to free up disk space similar to the feature that moves such files to iCloud? I would like ...
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252 views

Lost Partition on External Hard Drive When Setting Up Time Machine

I had an external hard drive with two partitions (Thing1, Thing2). Thing1 contained manual file backup data and Thing2 was empty and was my targeted drive for Time Machine. I opened Time Machine and ...
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569 views

External hard disk not mounting

I have a WD My Passport Ultra Hard Disk. I am trying to use it on El Capitan. Its not showing up in the Finder. When I open Disk Utility, it just keeps loading forever and does not show any ...
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986 views

External hard drive : Problems were found with the partition map

I have an external hard drive which carries all my most precious files (some are backed up on a second hard drive, but not terribly recently). I decided to "encrypt" this hard drive (which I ...
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48 views

What HDD to use as an *external* internal drive instead of optical drive in a MacBook Pro early 2011?

I was wondering if there are any recommendations on which HDD (Brand, Model) is best to be used in a MacBook Pro early 2011 13" (running El Capitan). I'm planning on exchanging my optical drive for an ...
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667 views

Hard Drive: I can see it in /Volumes, but it does not show up in Finder

I'm connecting my external Hard Drive on my Mac. It's a NTFS drive. It used to show up normally on Finder's sidebar and Desktop as well, but it doesn't anymore. But it does show up in /Volumes folder....
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201 views

How to Restore the Mail Symlinks to External Drive on 10.11?

My Mac Mail has been working using an external drive for the library and all messages since 2013. However I upgraded to 10.11 today and need to find a way to reference everything on the external ...
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303 views

Boot external Windows 8.1 installation on Mac Book Pro Retina 2015

In the past I’ve been able to run Windows 8.1 on a Mac Book Pro Retina Mid 2012 installed on an external hard drive using WinToUsb. I had OSX Mavericks installed on the internal drive. After turning ...
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67 views

Time Machine backup to run my MacBook on another

My MacBook is in the shop for repair. I have my Mom's MacBook, but the hard drive has failed. I'm wondering if I can use the time machine backup of my computer via USB to basically run my hard drive ...
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6k views

Disk Utility: Invalid Disk Label @ cksum mismatch

I have a WD external hard drive. I've been running the routine tests to make sure all my stuff is safe lately. In Disk Utility, I did Verify Disk on both the disk itself as well as the main partition, ...
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2k views

Recover partition from NTFS drive with folder structure

I ran disk utility and looked for errors on a NTFS drive that was working fine but had been ejected abruptly after the computer was forced to shut down. After that a bunch of errors just appeared in ...
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3k views

Why can't I search files and folders on my external NTFS drive on Mountain Lion?

I have tried to re-index my external drive by removing it from Spotlight's privacy settings and putting it back there. I tried with mdutil in the terminal and I've got the following log: bb:~ bb$ ...
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26 views

Samsung X5 external SSD not recgonized

I'm having trouble getting macOS Mojave to recognize a Samsung X5 external SSD. When I plug the drive in, it lights up, but the OS doesn't seem to see it. I've plugged the drive into a Windows PC ...
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32 views

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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33 views

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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19 views

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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32 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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34 views

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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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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19 views

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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40 views

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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172 views

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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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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48 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 ...
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48 views

Eject an external disk after improperly disconnecting it

I have a repeatedly run into this problem. On the one hand we could say, "always remember to eject your external drives before removing them". However, it's a matter of fact that I will forget, at ...
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44 views

Time Machine for reformatted external FileVault drive: how to explore files in backups; make future backups incremental from there

After the latest backup of an FileVault-encrypted SD was made on TimeMachine, I manually moved the its contents to another disk, then reformatted it, again as encrypted volume, and moved the file ...
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518 views

Multiple “Disk not ejected properly” messages during sleep

When I hook up a WD My Book 3TB external hard drive to my 2016 MacBook Pro via a third party USB-C to USB-A hub and let the computer sleep during the night, this is what I’m greeted with the next ...
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2k views

How far is my Time Machine “preparing backup” step?

I want to do a Time Machine backup and it's not the first time I do it in this external hard drive, so Time Machine is doing the "preparing backup" step since a few minutes. As it's been quite long I ...