Samsung SSD drive not showing when plugged in

external Samsung SSD drive not showing when plugged into Macs.

everything is all new/perfect condition.

i tried booting in Recovery mode.

Posted on Sep 19, 2026 8:11 PM

3 replies

neuroanatomist

Level 9 (72,871 points)

Sep 20, 2026 7:30 AM in response to Foreverholy111

Finder menu > Settings > General tab, tick the box to show External Disks. Change the same setting on the Sidebar tab, if you like.

If those boxes are already checked, then open Applications > Utilities > Disk Utility, select View menu > Show all devices. Does it show up there, and if so, can you mount it (button in the top toolbar)?

More info: Disk Utility User Guide for Mac - Apple Support

If you have a Mac laptop computer with Apple Silicon (M-series, and not applicable to Mac desktops), accessories must be allowed to connect. Go to System Settings > Privacy & Security > Accessories, try changing it to Automatically allow when unlocked or Always allow.

If you have 3rd party ‘protection’ software installed, that may be the problem. For example, ESET has been reported to prevent external drives and memory cards from mounting. Such 3rd party system ‘helpers’, ‘cleaners’ and ‘protectors’ do more harm than good. In fact, such products are completely unnecessary for macOS and the only ‘good’ (if you want to call it that) they do is to put money in the developers’ pockets. For the user, they offer only harm…and if that is limited to harm to your bank account, then count yourself lucky.

There were a few prior posts on this forum from users who couldn’t access their external drive due to the drive manufacturer’s software that they used to encrypt the drive. Lacie/Seagate, Samsung, SanDisk, etc., all provide 'drive management' software on their drives and using such 3rd party software can cause issues when macOS is updated and the 3rd party software becomes incompatible. Not sure if that's the issue here, but FYI the best practice with a new external drive (SSD/HDD, not applicable to NAS drives) is to use Disk Utility to complete erase it, format it as GUID/APFS and apply encryption if desired.

FWIW, I have a bunch of Samsung T7 and T9 SSDs ranging from 1 TB to 4 TB and a pair of Crucial 8 TB SSDs, and they all work fine with my M1 MacBook Pro running Tahoe and my M4 Pro MacBook Pro running Golden Gate.

Final note: if nothing at all is showing on your Desktop, go to System Settings > Desktop & Dock and make sure the box to Show Items On Desktop is checked.

Owl-53

Level 10 (123,805 points)

Sep 20, 2026 8:04 AM in response to Foreverholy111

Since the Samsung SSD is new and does not appear on the Mac, even after trying macOS Recovery, the key question is whether macOS is detecting the physical SSD at all or merely failing to mount its volume.

I would troubleshoot it in this order:

Connect the Samsung SSD directly to the Mac, without a hub, dock, monitor, or other adapter if possible. Try another USB-C/Thunderbolt port and, if the SSD came with two cables, try the other cable. Samsung specifically recommends trying another cable and another port when an SSD isn't recognized. (Samsung Semiconductor Global)
Open Disk Utility → View → Show All Devices. This is important because the default view can show only volumes rather than the physical device. Apple documents that "Show All Devices" displays the complete device hierarchy. (Apple Support)
Look in the Disk Utility sidebar for the Samsung SSD itself. There are three materially different situations:
The Samsung SSD appears, but its volume is greyed out:
Select the volume and click Mount. If necessary, run First Aid. (Apple Support)
The Samsung SSD appears as a physical device but has no usable volume:
If the SSD contains no data you need, it can be initialized in Disk Utility. Apple recommends GUID Partition Map for a newly initialized external drive. (Apple Support)
. The Samsung SSD does not appear in Disk Utility at all:
Do not erase or reformat anything. At that point, the issue is occurring below the normal filesystem/volume level, so changing the filesystem would not address it.
Because you already tried macOS Recovery, I would also check whether the physical device appears there in Disk Utility → View → Show All Devices. If it is absent both from normal macOS and Recovery, that makes a filesystem problem less likely and makes the connection path, cable/adapter, SSD firmware/controller, or the SSD itself more relevant.
If it is a Samsung Portable SSD such as a T7/T7 Shield/T7 Touch, Samsung currently provides Samsung Magician for macOS, and its current release is 9.0.2. Samsung says Magician supports Samsung portable SSDs. (Samsung Semiconductor Global) You can get it from Samsung's official Portable SSD support/download page.
Finally, test the SSD on another computer, preferably another Mac and, if available, a Windows PC. Samsung itself recommends testing the SSD on another computer when it isn't recognized. (Samsung Semiconductor Global)