why does this happen…solutions?
Hi @tkaineg
Have you checked our knowledge base articles?
(Get Support for Your SSDs and Flash Products | SanDisk)
Try this one.
Have you opened a Support Case?
If not, contact SanDisk Technical Support for assistance.
(Contact Support | SanDisk)
When your 4TB SSD disconnects from your Mac, check whether macOS shows a notification such as “Disk Not Ejected Properly” or “Eject disk before disconnecting or turning it off.” These alerts usually mean the connection between the SSD and your Mac was interrupted.
First, restart your Mac and see whether the SSD still disconnects and reconnects randomly. If the issue continues, try several common fixes. Disable the “Put hard disks to sleep when possible” option in Energy settings, as this power-saving feature can cause external drives to disconnect. You can also connect the SSD through a powered USB hub to ensure a stable power supply.
If the problem persists, try disabling third-party antivirus software, booting your Mac into Safe Mode, or running First Aid in Disk Utility to check and repair disk errors. It may also help to update macOS or revert to a previous version if the issue began after a system update. Also read: External Hard Drive Keeps Disconnecting Mac? (Updated for macOS Sequoia)
As a final step, backup or recover your important data and reformat the SSD.
