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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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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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27 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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22 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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14 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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8 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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37 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
19 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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1answer
26 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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21 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 ...
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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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1answer
25 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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15 views

macOS Yosemite not installing

I have an old computer with Yosemite that I cannot update but still supports Mojave. I want to install macOS on an external HDD, but using Mojave gives a prohibition error. However, when I try to ...
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2answers
33 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
114 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
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 ...
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2answers
71 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 ...
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1answer
68 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
23 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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50 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
38 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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15 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
55 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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19 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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57 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 ...
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7 views

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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9 views

Copy mp3s listed in a m3u-file to another harddrive

Over the last decade or two, I've collected quite a lot of mp3-files. I had them organised on an external / internal hard drive on Windows computers, and created a bunch of playlists with my favourite ...
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1answer
23 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
50 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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23 views

How to stop my external (USB) hard drive from sleeping/parking when not used

[MacBook Pro mid-2014 retina, Macos Mojave 10.14.1] I have a 3TB WD Elements (5400rpm) usb3 hard drive plugged into my laptop which I use for storing larger files since my laptop only had 500GB. I'...
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2answers
74 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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17 views

mount external drive not ejectable

I mounted without any problem an external USB drive and I can see on my Mac. I wonder if there is a way to let system identify it as "internal" drive and not as USB plugged device. It's a low profile ...
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1answer
30 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
12 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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73 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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1answer
19 views

Is it a bad idea to daisy chain to an internet router through an external drive?

I'm interested in setting up a wired connection to my router, in order to achieve a faster internet connection than I can get from built-in 802.11n. My 2012 Mac Book Air has only one Thunderbolt 1 ...
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10 views

Best way to copy FILENAMES, MODIFIED DATE & SIZE in multiple nested directories on external drives? [duplicate]

I want to create lists of ALL FILENAMES, MODIFIED DATE & SIZE in multiple NESTED directories on some external drives? I am a long-time Mac user but completely ignorant of UNIX-OS X command line ...
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434 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. ...
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0answers
15 views

How can I mount a removable device as un-ejectable [duplicate]

I have a Micro-SD card which I keep permanently inserted in my MacBook Pro using a nifty Mini-drive. I doubt it should matter, but this is a 13" early 2011 MacBookPro, running High Sierra (hardware ...
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1answer
373 views

Can’t mount external drive - Mojave

came up here after a lot of looking around. Even seen a couple of examples of my issue, JT not sure what to do. Have tried a bunch of stuff and still cannot not get drive to mount. Apple says to wait ...
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1answer
42 views

I tried activated the option to partition a disk, instead all my drive data disappeared in a few seconds

I read online that there was a command line to activate the partition option on Disk Utility: diskutil partitionDisk disk4 1 GPT HFS+ newdisk Which is just supposed to unlock the possibility to ...
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1answer
83 views

Can't mount back up drive on MacBook Pro

I have an ADATA Classic CH94 back up drive I've had since 2012, along with my MacBook Pro. However after a minor Apple update I did through the App Store (I'm currently still on macOS High Sierra) I ...
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4answers
2k views

Can I re-format OS X drive without removing it from my MacBook Pro?

I've got a mid 2012 MacBook Pro (non-retina) with a removable HD (Machine A). I want to perform a clean install of OS X El Capitan 10.11 on the HD, for which I have an install USB stick made. ...
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0answers
41 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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4answers
169 views

'The disk you inserted was not readable by this computer' when connecting external hard drives

I have a Synology NAS that has failed and I won't be replacing it. It had two 4TB Western Digital Red hard drives. I've bought a dual hard drive disk reader on Amazon and inserted both hard drives ...
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1answer
82 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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2answers
983 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 ...
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1answer
19 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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1answer
126 views

Check automatically if a drive is mounted

I'd like to automate my family backups, specifically I'd like to run a shell script (with rsync) when an external drive is connected. Since it's a family thing, it should be also sort of GUI driven, ...
4
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1answer
114 views

What data repair and recovery options exist for a missing APFS Volume?

I am using an OWC Envoy Pro enclosure with an Apple Samsung SSD out of a 2015 MacBook Air. It's plugged into a 2017 iMac 27". The External SSD) randomly gets ejected and as a result of this random ...
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0answers
31 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 ...