Questions tagged [external-disk]

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

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1answer
43 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
333 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 ...
9
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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
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 ...
2
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4answers
343 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 ...
4
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1answer
164 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 ...
2
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2answers
3k 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 ...
0
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1answer
20 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 ...
0
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1answer
285 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
256 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
45 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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1answer
552 views

Disk ejected but still show up in Disk Utility?

I have this external (USB) drive that can't seem to be disconnected correctly. Whenever I eject the drive, it won't disappear from Disk Utility. Afterwards when the drive gets re-connected again, it ...
2
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1answer
985 views

How to create a bootable disk for an older Mac? [duplicate]

The file system on an older Mac mini (early 2009, latest supported OS 10.11) got corrupt, and disk utilities ended up in an infinity verify-can't-repair loop. Thanks to a insightful tip I could mount ...
3
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1answer
141 views

Mac won't access 4 TB Seagate USB drive

I don't see it in Finder, I don't see it in Disk Utility. I don't see it in the system profiler. diskutil -list /dev/disk0 (internal, physical): #: TYPE NAME SIZE ...
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0answers
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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0answers
152 views

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 ...
2
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1answer
908 views

Connect an external SSD (USB Type-C) to Mac Mini (mid 2011)?

I have a Mac mini (Mid 2011) and I want to use an external SSD (Samsung Portable SSD T5) with it. Now the problem is that Mac mini (Mid 2011) only has: Thunderbolt port (up to 10 Gbps) (not ...
0
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1answer
294 views

Freeing up space on external hard drive after deleting time machine backups?

I had a external hard drive in use for Time machine, but now use a different one, so wanted to free up the space. I removed the HD from the Time machine backup drives, then deleted the Backups....
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1answer
251 views

Recovering a RAID 0 volume

In the process of upgrading a 2 4tb disk RAID 0 array from an iffy LaCie drive to a faster/more reliable USB enclosure I have lost data. The backups take a long, long time to restore so I'm hoping to ...
2
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1answer
750 views

external hard drive still shows in disk utility after it was removed

I unmounted and removed my backup disk called TimeMachine, but it still shows up in the disk utility app. I tried running $ diskutil unmount /dev/disk3s2 and $ diskutil unmountdisk /dev/disk3 ...
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0answers
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 ...
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0answers
134 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 ...
2
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2answers
485 views

Can't get write permission on external hard drive when exporting from Lightroom

A few days ago I bought a new 2018 MacBook Pro which is running macOS High Sierra 10.13.6. I have been a Windows user till then. After I edited my photos on the new Mac in Lightroom, I plugged in my ...
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0answers
18 views

Can I eject and remount an external drive Time Machine is backing up?

If I include an external drive in my time machine backup, can I be sure it will always be backed up any time it's mounted? What if I dismount it and then later remount it? Will Time Machine gracefully ...
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1answer
3k views

Slow write speeds with APFS encryped external SSD

I bought an external SSD with a USB 3.1 gen 2 enclosure. I'm on macOS 10.13.6 with a MBP (late 2013). Using APFS I get write speeds of around 390–405 MB/s. So far, so good. However formatting the ...
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1answer
62 views

What is the most efficient and reliable method for transfering/copying a large number of files from one external hard drive to another? [duplicate]

I have an NTFS external hard drive with ~300GB of data on it, and I'd like to be able to start writing to this drive without having to use any third-party software or other hacks/workarounds. I've ...
4
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2answers
364 views

External SSD with OS installed not working?

Four months ago I bought an external SATA case with USB-C compatibility so I can install my iMac OS there, did this because my iMac has built in HDD and was so slowww.. With the case I started using ...
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1answer
29 views

External HDD (Apple_HFS) not recognised by Finder under Sierra 10.12.6

my external HDD (used for TM backups and some other stuff) suddenly stopped working with my MBP 2017 (Sierra 10.12.6). I can see it only through the Terminal (see screenshot 1) DiskUtility won't load ...
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1answer
39 views

macOs High Sierra External Hard drive problems

I have a Toshiba DTC810 external hard drive that was working properly for almost a year. Then, suddenly, yesterday I plugged the drive into the USB port and it wasn't working. I tried to plug him into ...
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0answers
76 views

Upgrade a USB install of Sierra to High Sierra. Possible?

I was recently given a Macbook Air 2012 with a malfunctioning SSD (common problem in this model -- SSD is recognized as 33 kB SandForce disk), so I decided to install and run macOS from a USB stick. ...
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0answers
144 views

PCMCIA USB 3.0 card for Mid 2010 Macbook Pro

I had an 17 inch Mid 2010 Macbook Pro (MacPro6,1) that had 3 USB2.0 ports, and a 34PIN expressCard slot. I heard one way to get USB3.0 I/O for this machine is to use a USB 3.0 PCMCIA expressCard. ...
3
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1answer
209 views

Using an external HD as my applications folder

I need to install more applications - can I use my external HD (samsung T5) and add an additional applications folder? I have loads of space on it and it the speeds are great.
2
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2answers
64 views

Please help: Win7 on external FireWire drive results in “No bootable device - insert boot disk…” error

I'm trying to get Win7 working from an external FireWire drive (Macbook pro mid 2009, OSX El Capitan). I've tried the two tutorials below; the installation seems smooth either way and mac recognizes ...
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0answers
317 views

Two computers, one External Hard Drive, two different operating systems with Time Machine okay?

We have two computers, an old MacBook Pro running El Capitan and a 2014 Mac mini running High Sierra. They each need about 600-700 GB to back up. I purchased a 2 TB external drive and was just ...
3
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3answers
117 views

How to work with 2 Applications folders?

I have an internal 250 GB SSD. this drive was filling up and I bought an external 4 TB external hard drive. My Applications folder on my SSD was taking up a lot of space so I decided to create an ...
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1answer
1k views

Bootcamp install on external, partitioned HDD reboots to Boot Recovery Assistant

I have followed this guide: https://9to5mac.com/2017/08/31/how-windows-10-mac-boot-camp-external-drive-video/ When I select EFI Boot from my Samsung M3 portable drive it reboots to the boot recovery ...
2
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1answer
263 views

How can a Mac split a single backup to two independent, external drives

I have been asked to perform an emergency backup of a device showing signs of HDD failure. I'm being provided with two individual external hard drives to accomplish this. Each drive is independently ...
1
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1answer
128 views

Using Apple Remote Desktop to view External HD files

Can I have my Macbook Pro offsite access my other Macbook Pro at home using the Apple Remote Desktop? (Or if you know of another better way to access, let me know.) If so, can the Macbook Pro at ...
2
votes
1answer
2k views

How to edit files on/copy to an NFTS external hard drive? [duplicate]

I've got a WD MyBook external hard drive formatted in NTFS with files on it. How can I edit files already on it as well as paste files to it? I've installing Mounty and when I try to re-mount it read-...
4
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2answers
1k views

Unable to eject disk images or drives in High Sierra

I am running a MacBook Pro Early 2015 13" on High Sierra 10.13.5, and keep getting the "X disk cannot be ejected because one or more programs might be using it" message, when apparently there is no ...
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0answers
49 views

External HDD not properly recognized

Today I connected my external HDD (WD elements) to my MBP and it was not recognised properly. The disk has two partitions, one an NTFS partition with some files and the other a Veracrypt partition. ...
3
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1answer
228 views

How to fix my external hard drive after connecting it to a pc? Possible USB 3.0 to USB 2.0 problem?

I bought an external hard drive, connected it to my MacBook, put some stuff on it, connected it to a pc, tried to transfer video files to a friend (pc owner), spinning wheel of death, friend pulls out ...
2
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0answers
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 ...
2
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2answers
1k views

Is it safe to add other files on the same drive that Time Machine uses as a backup destination?

I have my back-up data & storage all on the same partition (No partitioning was done) on an external HDD? Could time machine overwrite other data or does this arrangement keep all the data on the ...
0
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1answer
136 views

How do I copy my pics on icloud to an external hard drive?

I'm trying to figure out how to back up my pictures on iCloud to an external hard drive. Do I seriously have to do this one pic at a time?
3
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2answers
281 views

Time machine external disk ejects before backup is complete

I'm creating the first full backup on a new 3TB drive. Time reports just over 1TB will be needed. Drive returns a disconnect message and time machine stops after every 100-300mb. My Mac runs High ...
2
votes
1answer
630 views

time machine runs very slowly, then stops

I've been using Time Machine with my MacBook Pro without issues for some time, however, I’m now having a problem that I haven’t had before: when connecting the external hard drive on which backups are ...
2
votes
1answer
606 views

Does high sierra eject external USB drives upon logoff?

I have both a USB hub that has a flash USB and an external USB drive. A family member often pulls it out without ejecting, and I'm trying to ease the effects of that. I put an AppleScript on the ...
2
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1answer
92 views

I removed my external drive icon on my macos, how do i put it back?

As per title, I decided I wanted to remove my external drive icon (the one that is shown, usually, on the desktop) on my mac, but now I'm not able to put it back. The problem is not due to the finder ...
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1answer
430 views

WD external hard drive got disconnected without eject

So my WD External Hard Drive wasn't ejected properly. It shows up in Terminal and Disk Utility, however it is unable to mount. When trying First Aid, I always get these results: Repairing file system....