Questions tagged [external-disk]

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

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382 views

Shortcut Virus: What's the effect on a Mac?

I was at school when we tested a PowerPoint presentation on one of the school's laptops. Apparently, when we got home, many of my classmates told me that the laptop gave a "shortcut virus" on their ...
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683 views

Time Machine - “tmutil” syntax to inherit backup set for new drive

My iMac had an SSD startup drive (called SSD) and a 3TB internal hard drive (MacintoshHD) duplicating the SSD as well as containing the User folders and all data. MacintoshHD died last week. I ...
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417 views

Time Machine + PC backup to single external hard drive

Does "backing up" read/write data to a hard drive? I'd like to backup both my Mac (using Time Machine) & my PC to a single 3 TB Seagate external hard drive using the USB port on my wireless ...
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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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1answer
420 views

Disk Unable to Mount

I've got this really old external drive which I store files from way back in college (~7yrs ago) in. Recently it has started acting up. I've tried a load of different option to reformat it (...
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Some external hard drives not recognised by mac

Running High Sierra. I used a Seagate external hard drive and a Verbatim hard drive for Time Machine backup. Suddenly they are both not recognised by the iMac. The power lights are on and the disks ...
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233 views

Mounting an External HD Accessible Through Finder

Good Afternoon All, I am attempting to mount an external hard drive using ext4fuse. I have installed ext4fuse using the following: brew tap homebrew/fuse brew install Caskroom/cask/osxfuse brew ...
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2answers
56 views

What is main difference in a portable external HDD and a regular external HDD?

I have an external 3 TB WD drive for backup. I think it is shot so I want to replace it. I don't need a portable drive but if they are more durable I'd like to get one. The cost difference between ...
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1k views

External drive with OS X 10.13.2 will not boot from USB 3.0 enclosure

I'm cutting and pasting from Apple's Community support site where I posted this issue today, rather than type it again, since the details are dense: My system, prior to 12/20/2017 was a MacBookPro9.2 ...
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224 views

help in writing script to mount external hard drives

Using: MacBookPro (Retina, 15-inch Mid 2015) macOS HighSierra V 10.13.2; Internal HD has 250GB. In order to save space in my HD-internal, I have 5 USB connected external disks which are for backups ...
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47 views

Safe to unplug external HDD that has spun down?

I often can hear that an external HDD has spun down, and figure it would be safe to unplug since it won't be writing any data. Am I wrong in this assumption?
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How to merge two partitions on external hard drive when the “partition” option is greyed out?

I have an external hard drive that is connected to my computer by a SATA/eSATA cable. Diskutility recognizes the hard drive as two separate drives as shown in the following two images: I can't seem ...
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537 views

Problems getting macOS Sierra on a bootable hard drive

I'm trying to get a bootable hard drive with macOS Sierra going so that I can use Octane Render. My Macbook is running macOS High Sierra, which is apparently buggy with Octane at the moment. I ...
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1answer
752 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, ...
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2answers
83 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 ...
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1answer
49k 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 ...
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1answer
39 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 ...
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1answer
145 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 ...
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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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649 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. ...
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1answer
777 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 ...
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864 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 ...
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487 views

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

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 ...
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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.
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211 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 ...
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2answers
144 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 ...
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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 ...
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1answer
689 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 ...
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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 ...
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120 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 ...
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1answer
111 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; ...
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2answers
351 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 ...
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558 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 ...
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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 ...
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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?
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1answer
320 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 (...
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270 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 -...
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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 ...
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1answer
232 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/...
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441 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 ...
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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 ...
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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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1answer
262 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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2k 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 ...
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1answer
209 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 ...
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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 ...
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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. ...
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1answer
193 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 ...
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1answer
37 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 ...
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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 ...