Questions tagged [external-disk]

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

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1answer
39 views

Troubleshooting: 90 seconds to eject external Time Machine drive?

I have a 5TB USB-C drive attached to my 16" MacBook Pro running Big Sur 11.2.3. I use this drive exclusively for Time Machine. When ejecting the drive, it takes anywhere from 90 - 120 seconds ...
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1answer
43 views

Why are my Mac and Windows machine able to share a flash drive, but they cannot share an external hard drive?

I am recording Zoom meetings with my Windows machine and storing the videos on an external hard drive. I wanted to consolidate the folders by adding videos I have recorded on my Mac, but I realize I ...
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36 views

The APFS partition on my external hard drive doesn't mount anymore

I have a WD Elements 1.5Tb external hard drive with two partitions. One is for Windows (that I use with Bootcamp on my mac), the other is for OSX (APFS file system). Usually, OSX can see both WIN and ...
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1answer
44 views

Is there any MacBook-supported filesystem that will not do a scan every time its underlying external HDD gets unplugged without eject?

Currently, with ExFAT filesystem on an external HDD connected to a MacBook Pro I experience very long scan times (proportional to the size of the HDD, several TBs in this case; MacOS is used here) ...
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17 views

Time Machine Backup Drive Shows Empty Files

I have backed up my MacBook using Time Machine to an external hard drive. Now, when I try to open it on a Mac Mini, it doesn't detect my .backupdb files. I were able to see some of the .backupdb file ...
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22 views

Can't restore Mac from Timemachine on external drive

I am doing time machine backups of my 2 macbooks on one external drive. That drive has 2TB capacity and I have split it to 500GB for my 13 mac and 1.5TB for my 16 mac. 16x - partition for my 16 inch ...
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1answer
26 views

Prevent external drive from requiring ejection

I have an external that is only used for time machine backups. Is there any setting that would allow the drive to be "hot swapped" (I'm assuming this isn't the correct term, but I'm unsure ...
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2answers
55 views

Slow transfer between two external drives

Copying data to a USB external drive is much slower than expected. I have a 6TB external RAID drive that holds my photos, and I'm trying to do an archive copy of this data to another external USB ...
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0answers
40 views

USB 3.0 hub connecting over USB 2.0; How to correct?

Issue: I have a couple USB-C 3.0 hubs, and a 2016/2017 MacBook Pro 13" [Fn-Key]. The first hub, everything connected over USB 2.0, so I assumed it was just a shitty hub, so I bought one from ...
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1answer
14 views

Copying greyed out files between drives

I am trying to copy data from an external NTFS drive to an exFAT drive. However, some files are greyed out and give me this error when I try to copy them: One or more items in “IMGP0029.AVI” can’t be ...
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4answers
690 views

How can I tell if all USB-C ports on a 2020 M1 MacBook Pro are the same speed, or if one or more will be faster than others?

I'm doing some heavy copying of files, and wish to do it via the fastest USB-C connection possible. I tried holding option and clicking on the apple logo on the very top left, then going to System ...
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External hard drive won't mount or show up

I have tried all sorts of things but still won't mount and I have no idea what to do, I used the ps aux | grep fsck command but no result. I'd be grateful for any help. Thank you.
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1answer
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I have an external 1TB Seagate Harddrive but it shows that only 268MB is available. Why?

I tried to erase it with Disk Utility but unsuccessful. It still shows that only 268MB is available, while another utility program (balenaEtcher) used for writing image files, shows 1TB free space. ...
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1answer
31 views

How to safely eject a volume when the icon has disappeared?

I was using an external hard drive and the icon has disappeared (the program used to mount the volume hung so I stopped the process with diskutil unmountDisk /dev/disk3) - so now I do not know how to ...
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Replacing external drive, reuse the drive name?

I want to upgrade my external drive. Due to the small capacity of of my Macbooks HD, the external drive is used to store everything except for applications. I want to change out the drive and try to ...
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2answers
34 views

Can i store and access iphotos library on external hard drive (and still have it backup to my cloud network)?

I have two questions regarding Apple photos library. Can I store my large Photos library on an external HDD? Is it possible to set this HDD to backup via my computer to the same local network ...
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63 views

Uninitialized external hard drive fix

I plugged my hard drive as usual and it does not mount. I go into Disk Utility it tells me that there are 2 parts to my hard drive. The first part is titled AppleAPFSMedia and is uninitialized. I have ...
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18 views

External HDD drive media playback lag

I have MacBook Pro 2014 with Sierra. I use NTFS formatted external HDD, accessing it with Tuxera NTFS. When I play some media directly from the drive, there is a lag, now and then. It all looks like ...
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1answer
54 views

Can Big Sur disable external drives?

Been having several seemingly unrelated problems with a new (2019) MacBook Pro (MBP).  All of them seem more like software than hardware (as a retired software engineer with ten years as an ...
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27 views

two external drives suddenly disabled after connection with macbook pro (big sur)

I purchased two external drives of 5Tb from Western Digital. I formatted the drives using disk utility program (OS with journalling). I connected the first and started to make backups using time ...
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0answers
49 views

Install macOS onto external drive without rebooting

Do you know if there is a way to install macOS onto an external drive without having to reboot the computer or go into recovery mode? If this is not possible, is there a way to install macOS in ...
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24 views

How to open an external hard drive when its detected by Disk Utility but not in Finder?

I have a microSD card that is working on my dashcam. But not mac. (latest Big Sur) It's seeable in the Disk Utility but not in Finder. What should I do? Update: aab-MacBook-Pro-2:~ myname$ diskutil ...
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87 views

“startosinstall” is stuck on “Preparing to run macOS Installer…”

I have a MacBook Pro early 2015 running macOS Big Sur and am trying to use startosinstall to install macOS Catalina or High Sierra onto an external SSD. I want to be able to distribute macOS to ...
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1answer
41 views

Renamed external drive still appearing in terminal with both old and new names

I have an external drive connected to my MacBook Air via USB 3.1 Gen 2 through a TB3 hub. A few weeks ago I changed name of the drive from Mercury 1TB to just Mercury. This was done in the Finder. I ...
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1answer
26 views

External Hard Drive Won't Mount on my 2018 MacBook Pro

I have a "G-Technology G-Drive USB External Hard Drive" (8 TB) that I'm using as a backup target for Time Machine. It uses an external brick power supply. I bought it a few years ago and it ...
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2answers
115 views

Use “startosinstall” to install macOS Catalina on External Drive

I want to use "startosinstall" so that I can install macOS Catalina onto an external hard drive in order to preload MacOS onto multiple SSD's quickly. I've researched into this and have ...
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1answer
32 views

How do you perform a proper time machine backup when you have existing data in the hard disk that you have saved

Sorry for the asinine question but I am pretty much paralysed with fear on how to do a proper backup without losing anymore data. My hard disk went blank and I managed to salvage the data with the ...
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1answer
55 views

Booting from a cloned Windows 10 installation

I have Windows 10 Pro installed on a external flash drive, I tried to install Windows via bootcamp but it is required to have more free space. I succeeded to install Windows 10 with VirtualBox on a ...
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1answer
58 views

External drive for Time Machine cannot be mounted, formatted or repaired

I just upgraded my MacBook Air to 11.1. I used to run regular backups on a WD 1TB disk using Time Machine. But for a couple of days, the backup has not completed, issuing a "cannot find disk"...
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1answer
47 views

Can I back up one external hard drive to a smaller external hard drive via Time Machine?

So I've just had an external hard drive (5TB Seagate Backup Plus Portable) fail on me, the 3rd such time in 5 years. This is not unexpected behaviour in my experience: each of these hard drives has ...
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1answer
45 views

Moving time machine backup sparsebundle from Time Capsule to USB exFAT disk

I have a Time Machine backup on an Airport Time Capsule (name: computername.sparsebundle). Now I want to access that backup on a USB disk formatted as exFAT. Several online resources describe the ...
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1answer
54 views

Old iMac Hard Drive not readable as external

My friend's iMac would not boot. I ran TechTool Protogo using a thumb drive with TTP 9 to test the hard drive. It reported several hundred failed sectors on the drive, so I recommended we replace it....
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39 views

How to expand a XIP file to an external drive when having low space on the drive where MacOS is installed?

I am running Xcode from an external drive because now the size ballooned to ~30GB and I don't have that much free space. I'm using 12.3 but as 12.4 got released I would like to upgrade. I downloaded ...
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1answer
26 views

External Drive not showing up, light blinking, iMac

External Drive disconnected during backup but now it won't show up again. The light keeps blinking. How do I fix this problem? What I tried and didn't work: New USB cable Connect it to a different ...
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52 views

How to clone a MacBook Pro disk into bootable external device

I would like to clone my MacBook Pro (15-inch 2018, macOS Mojave 10.14.6), which I will call "Mac", into an external USB hard drive, which I will call "backup". I want to do this ...
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1answer
36 views

Moving iMovie (10) libraries to external hard drive

I have a friend who have a 13" macbook pro from 2014. The OS is Yosemite 10.10.15. My friend would like to upgrade her OS to either High Sierra or Mojave or even maybe Catalina or Big Sur, ...
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1answer
64 views

Using NTFS-3G to write to an external hard drive results in error code 100102

I have an external Seagate hard drive that is recognised and works on Windows computers but not on my MacBook Air which I am currently using. I am able to mount the hard drive in read-only mode but I ...
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0answers
39 views

External hard drive not recognised on Mac - Problem when using diskutil command on Terminal to eject it

I have an external Seagate hard drive that is recognised and works on Windows computers but not on my MacBook Air which I am currently using. I have looked at a lot of tutorials regarding this, and I ...
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4answers
688 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, ...
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1answer
401 views

How do I encrypt an external HFS+ drive without erasing it on Big Sur?

I have a Time Machine backup drive, which has to be HFS+ for Time Machine to work on it, and which I don't want to erase since it has a long history of backups. I would like to encrypt it. What I find ...
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0answers
13 views

External Monitor set to wrong resolution - can't connect anymore

I set my external monitor to an unsupported resolution after which the monitor immediately crashed. Now, whenever I plug it into my mac, it crashes, reboots, reconnects and then immediately crashes ...
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0answers
36 views

What are the best practices for moving macOS App(s) to an external drive?

I'd like to free up space on my mac's internal HD. I currently run with no external HDs. Seems like one option is to selectively move one or more apps (that I don't use very much), along with their ...
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1answer
76 views

Boot from external drive using rEFInd only if external drive is connected

I'm trying to use an external drive to contain a Windows install and a Big Sur install, but I'm having trouble configuring the boot options on a MacBook Pro 2018. I partitioned the external drive to ...
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4answers
318 views

Cannot reformat or unmount external that was used for Time Machine

Trying to reformat a drive that was used for an employee's Time Machine and Data storage. It is a partitioned drive. Disk Utility failed to unmount the Data partition and reported the TM partition was ...
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0answers
14 views

Random prompts for password for an encrypted time machine drive

Time Machine on my 2018 model Mac Mini is set to use an encrypted external hard drive that is connected directly to a USB port on the back Mac Mini. From time to time, I am prompted for the password ...
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1answer
42 views

my macbook does not recognise the hard disk [duplicate]

I have plugged in the hard disk in my macbook, and the hard disk's led has turned on. Nevertheless I cannot see the hard disk anywhere. I tried with df -h and lsusbbut none of them give a difference ...
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2answers
26 views

How do I erase MacOS from HDD but keep personal files (i.e. convert a bootable disc to a storage disc)?

I have a 2TB Seagate HDD which used to sit in my old Mac Pro. It has both the OS and my personal files on it. I want to sell my Mac but keep the drive and use it as an external HDD for my MacBook Pro. ...
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0answers
282 views

Mac keeps crashing after installing Big Sur to external SSD

My 2018 macbook pro never used to crash. However it has other problems with the hard drive storage. So I installed Big Sur onto an external SSD. Ever since this my mac crashes at random times, both ...
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1answer
20 views

How to remove Windows partitions on external HDD?

Hi! I wonder what is the correct procedure to remove all partitions from an external HDD (500GB) that was previously a Windows boot HDD (Extracted from my old PC). Before the erase, there were 3 ...
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1answer
112 views

OSX - Not enough disk space to copy file

I've been having issues with my Corsair keyboard and the first step given to me by support was to try updating the firmware. After plugging in the keyboard with the reset button held, it shows up as ...

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