As a disclaimer please always make sure you have secured your 24 word seed phrase and backed up your funds prior to deleting any data on your storage drive, SSD/HDD
This error is the result of a failing read/write issue with the installed drive, it can also be caused by a failing storage device or a storage device that has not been formatted correctly in ext4, has become corrupted, or had data on it prior to installation.
The most reliable fix for this issue if you are on the Rasperry Pi 4 platform is to reflash your MicroSD card.
For reference, reflashing will not result in any data loss because all user data is stored on your external storage drive (SSD or HDD). To reflash your MicroSD card, follow the steps on our website to “Install on a Rasberry Pi 4”
If it is your first time setting up Umbrel, and you don’t have any data on it yet please try reformatting your storage device again and make sure all partitions are completely clear- this is also a common cause if you already had a prior installation or any data on your drive and are trying to setup like new once more. You can delete all partitions and format in any default format file type, upon a successful Umbrel installation- during the Umbrel setup it will then automatically format again in the correct ext4.
It looks like you haven’t flashed since v0.3.9 and thanks for being a legacy user!
Steps to SSH can be found in our FAQ here under How to SSH into Umbrel on a Raspberry Pi