Does this "Segate Personal Cloud" not have any kind of support ?
Seems like they would be the ones to ask about this.
http://www.seagate.com/support.Recovering the administrator password
To have full access to the NAS, the administrator signs in with the domain’s administrator password. If you forget the administrator’s password, you can use a password reset disk to create a new one. As an important backup measure, Seagate recommends that you create a password reset disk when you initially create your password.
Create a password reset disk
To create a reset disk, you need a USB key or flash drive.
In the Control Panel, select User Account.
Select the administrator account.
Select Create a password reset disk.
Follow the on-screen instructions.
Keep the USB key or flash drive in a safe location.
From what I can see , Debian does not come pre-installed on this Seagate device, some body had to install it , they also would be the one that has the password, etc.
https://wiki.debian.org/InstallingDebianOn/Seagate/PersonalCloudThe Personal Cloud devices come with the Seagate NAS firmware pre-installed and there is no easy way to re-install the Seagate NAS firmware after you install Debian. We therefore suggest you create a disk image before you install Debian. This warning does not apply to the Seagate NAS (2-Bay and 4-Bay) on which the original Seagate software can be re-installed with a web interface even after you format the disk.
Post by qwertyjjj » I did not set it up, it comes with everything installed OOT
Who ever set it up for you should have the password info, they also would , or should have the original "disk image"
We therefore suggest you create a disk image before you install Debian.
If they did not make one, then they also did not know what they were doing, so you may have all sorts of unexpected problems.
This is probably a stripped down version of debian on a NAS OS device.
You don't seem to know much about the device, are you sure it is yours ? Or where did you get it ?
If it is a NAS 2 Bay and/or 4-Bay, there is another option:
Also from the Debian wiki :
This warning does not apply to the Seagate NAS (2-Bay and 4-Bay) on which the original Seagate software can be re-installed with a web interface even after you format the disk.
https://www.seagate.com/manuals/network-storage/seagate-personal-cloud/passwords/There are many other models, of the Segate personal cloud NAS devices,
the password recovery varies, and you don't seem to know what model it
is,... in any event some search foo, could find the solution, with enough details.
I am sure the previous owner, or system owner/admin, has those details as well. Maybe contact them.