Questions tagged [external-disk]

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

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votes
1answer
736 views

How do I enable Time Machine local snapshots on an iMac?

I have an iMac with a Fusion drive running High Sierra. Time Machine is enabled and backs up to an external disc. Time Machine takes daily local snapshots so that you can go back to a specific day, ...
2
votes
2answers
80 views

After disabling auto mount, can I show connected but not mounted drives in Finder sidebar?

I have an external hard drive connected to my cinema display. I don't use the hard drive every time I connect my laptop to the display. However, I forget to unmount it almost every time I disconnect ...
10
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1answer
45k views

Force mounting an external disk that is not recognized

I recently bought a 4Tb 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 ...
1
vote
1answer
38 views

Restore flashdrive to original state diskutility

I have pen drive which has two partitions with almost no storage in each. The full size of the things is 8GB as you can see in the image below. The problem is diskutility commands eraseDrive and ...
1
vote
1answer
142 views

High Sierra iconserviceagent goes wild

Nearly every time I mount an HFS+ volume on macOS High Sierra 10.13, a process called iconserviceagent reads all its files, sometimes hundreds of gigabytes. The system slows down to a crawl and the ...
3
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0answers
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, ...
2
votes
0answers
600 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. ...
2
votes
1answer
738 views

Paragon Driver for Seagate

I'm using MacBook Pro with Mountain Lion (OSX version 10.8.5) and I want to copy some data from the MacBook Pro to an NTFS formatted external hard drive. I know that we can use the paid solution from ...
3
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0answers
828 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 ...
2
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0answers
471 views

How to remove/eject non-existing External devices from Disk Utility?

For some reason Disk Utility (16.0) didn't eject my HDDs correctly and show the list of ghosts external drives as per below image: despite I've no any external hard drives connected. Ejecting them ...
2
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1answer
3k views

Can you use APFS on an external drive?

I believe that the answer to this question is "yes you can but you should not." Explanation is below.
1
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0answers
196 views

WD Drive Utilities app crashing on launch?

Today, the WD Drive Utilities app on macOS started crashing on launch. This is very strange, since it was working fine as of yesterday. I have three versions of the app: v2.0.4.9 (preinstalled on WD ...
3
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2answers
131 views

macOS app for showing external HDD usage statistics?

I'm planning on selling a used external HDD on eBay. Are there any applications for Mac out there (preferably free) that can show me statistics about the usage history for the drive so that I can let ...
1
vote
1answer
2k views

Can't boot from external APFS formatted SSD

I have a Mac mini with macOS High Sierra and an external SSD drive connected via USB also with High Sierra on it. After converting the external SSD to APFS it doesn't boot anymore - my Mac can't see ...
2
votes
1answer
647 views

How to read/write from/to a NTFS formatted External HDD on MacOS high Sierra?

With the introduction of APFS in MacOS high sierra I am unable to read/write from/to my external HDD which is formatted in NTFS. I need this case because I regularly switch between windows and mac and ...
1
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1answer
1k views

Merging Time Machine Backups to a Single External Drive?

I currently have two Time Machine external drives, but I want to move to using just one (I'd still have more than one backup, as I also use Backblaze). Is it possible to merge the two different ...
0
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0answers
118 views

How to identify and fix and external storage performance issues with macOS High Sierra

I've just updated to High Sierra and immediately noticed that copying files from external storage devices is much slower than in previous versions. While searching the web for info about what might ...
2
votes
1answer
102 views

Is it normal that External Hard Drives continue to be listed in Disk Utility / diskutil even after Eject?

I have an USB External Hard Drive which has been behaving strangely lately. I'm concerned, amongst other things, that it doesn't seem to Eject properly1. When I Press the Eject button in Finder; ...
2
votes
2answers
334 views

Recovering “Damaged” Files on External USB Drive: GUID, HFS (can not open files)

I had some files on an old thumb-drive, and recently I was going through and discovered that all/most of the files were no longer readable by any of my macs. I seam to remember having similar problems ...
0
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0answers
529 views

Mac Won't Mount Linux External Drive

When I plug in an external hard drive, I get "The disk you inserted was not readable by this computer". The "Disk Utility" applications sees the physical drive, but doesn't show any partitions. If I ...
0
votes
1answer
2k views

Can you read and write from and to APFS under High Sierra to FAT external hard-drives?

Like many I have backups on external hard-drives, some are in HFS and others are in FAT32 or NTFS. What happens to those backups with APFS ? I won't be able to access, read and write to or from them ...
22
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4answers
12k views

Does Time Machine support APFS?

I just updated to macOS High Sierra. What's the best way to use Time Machine under Apple's new APFS file system. Should I use Disk Utility to convert my external Time Machine volume to APFS?
0
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1answer
314 views

Time Machine Extremely slow

Mac mini Late 2012 OS 10.12 Sierra. I recently replaced fusion drive with a 1TB SSD and a 2TB disc Hdd as two separate internal drives. I restored using Time machine Backup from an external drive (...
0
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1answer
257 views

Strange messages from fsck_hfs

I am trying to check an entire USB external disk that is not erased. For that reason I have typed fsck_hfs -fy -l -S -d /dev/disk1s2 This the result Several messages I found strange here NO WRITE -...
1
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2answers
4k views

Why is finder asking to authenticate when copying to my external hard drive?

macOS Sierra 10.12.6 (MacBook Air) I am trying to move a directory/folder from my local disk to an external hard drive. But I get an error that says: Modifying "Remote Disk" requires an ...
0
votes
1answer
219 views

Samsung Portable SSD t3 2TB drive only shows 250GB capacity

I am running Mac OS X El Capitan 10.11.6. My 2TB Samsung T3 only shows 250GB Capacity. I have installed the activation software from: http://www.samsung.com/semiconductor/minisite/ssd/download/...
4
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2answers
414 views

Mounting an external hard disk clone that shares the same partition GUIDs as the source/host hard disk

Recently my Macbook's hard disk started to get badblocks and I promptly managed to make a disk clone with ddrescue into an external drive through an Ubuntu live session. I successfully cloned ...
3
votes
3answers
2k 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 ...
2
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0answers
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 ...
2
votes
1answer
258 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 ...
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0answers
1k views

recover Files from corrupted External USB HD, macOS Sierra

I don't deleted the files, my External USB Hard Disk is not broken, it not suffered fall. On the second image you can check the size of the HD 1TB with 2nd partition Size of 999.9GB, but on the first ...
1
vote
1answer
205 views

How to have a non-obvious encrypted partition on an external hard-drive with MacOS Sierra?

MacOS Sierra asks for password whenever I plug in partitioned external drive which I do not want to happen. I have Macbook Pro 2016 running Sierra 10.12.6 with a Seagate Backup Plus Slim 2TB Portable ...
-2
votes
3answers
1k views

Is there an external SSD enclosure compatible with OWC Aura SSD?

I have bought an OWC Aura SSD that I have used to expand the memory of my previous Macbook. Now, for various reasons, I would like to use the Aura SSD as an external drive. Is there any enclosure ...
1
vote
1answer
3k views

Cannot mount/unmount external hard drive on Mac

I have a 1TB external hard drive. It was used as backup disk for Time Machine. But from one day, my Mac cannot recognise it. The problem may caused by my removing disk without ejecting it first. ...
9
votes
1answer
189 views

Force my MacBook Air that uses external USB as boot drive to hibernate/suspend to disk?

There are several questions about hibernating (suspending to disk) but most are concerned with battery life and so many answers basically say just use sleep (suspend to RAM) because the battery will ...
1
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1answer
36 views

How do I clone the local drives' Users directory ACL to an external drive?

My local drive (Macintosh HD) runs out of space so I want to setup an external drive (External HD) with the same /Users directory and associated ACL as on the Macintosh HD drive and offload some of ...
2
votes
2answers
11k views

Why was my drive not converted to APFS while installing macOS High Sierra public beta

I was wondering why my drive wasn’t converted to APFS after installing macOS High Sierra public beta. I tried to convert it to APFS after the fact, by booting into Recovery Mode and opening Disk ...
2
votes
1answer
301 views

Eject Virtual Devices permanently

I installed some programs (e.g. Sequel Pro), when I eject the virtual device from the Finder it seems ok but after some time it is re-added. Is there a way to remove them permanently? What is the ...
2
votes
0answers
462 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 ...
10
votes
3answers
29k views

macOS: Can't mount exFAT External Drive

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 ...
-1
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2answers
65 views

Duplicating an entire disk

I need to replace a fairly new disk with a physically smaller one. It's not bootable: a Time Machine partition, an HFS+ storage partition, and an ExFat that has a trivial amount of Windows storage on ...
0
votes
2answers
2k views

*macOS 10.13 High Sierra Beta* Cannot Resize APFS Volumes on External Hard Drive

I have impatiently updated my Mac to the High Sierra Public Beta and I noticed something strange when I was trying to mess with my external hard drive. I have a 4TB WD MyPassport for Mac and I was ...
2
votes
1answer
4k views

New Macbook Pro 2017 won't boot from USB drive

I have a new Macbook Pro 2017 (No touch bar) that will not boot from an external USB-C SSD drive. I cloned a 2012 Macbook air using Carbon Copy Cloner onto the drive and I have confirmed that the ...
1
vote
2answers
93 views

How to mount external volume on /Users

I have been trying to migrate from an old Mac Pro with big internal disk to a new iMac with (small) internal SSD and big external Thunderbolt disk for a while and found no direct answer. I have a time ...
4
votes
1answer
404 views

Recover external hard drive after dd command

I'm trying to be calm... and will try to explain this as best I can. I was trying to use the dd command to burn an iso image to a 16GB MicroSD for my RaspberryPi. I had my 2TB USB hard drive also ...
1
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0answers
753 views

Seagate Backup Plus 4TB, USB 3.0 (2013) - Smartctl open device: disk8 failed: Operation not supported by device

I own a Seagate Backup Plus 4TB, USB 3.0 from year 2013. Now Time Machine throws random errors, so I wish to check disk health. > brew install smartmontools > smartctl -a disk8 smartctl 6.5 ...
3
votes
1answer
723 views

Using external USB hard drives via a USB hub connected to a MacBook Air

If I want to connect 2 usb external hard drives at the same time, will I be able to use a USB hub? I read somewhere "Never connect your external HD thru an external USB hub!" Is this really true?
1
vote
1answer
347 views

“Disk not ejected correctly” msg from 2016 MacBook laptop

I sometimes use the laptop periodically throughout day without unplugging it or the external drives. However, if it puts itself to sleep as a result of a period of inactivity, when I reawaken it, I ...
2
votes
0answers
435 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 ...
7
votes
2answers
3k views

Clone one Mac and restore it on multiple Macs

I am going to setup a bunch of MacBooks Pros with the same settings. I could go through every Mac and install all the programs but here is what I would like to do. I would like to setup one Mac with ...