Windows 10: How to Switch Default Drive from C: to D:

Hello,


A while back my friend built a pc for me with a hard drive of about 230 gb. After a while I bought a 1tb hard drive and never got around to properly switching everything. Its connected and I have a few folders in it. Recently I ran out of storage on my c: drive and want to switch everything over to my d drive. I'm having difficulties doing that and I'm scared im going to lose everything.


Please Help :

:)

 

Switch Default Drive from C: to D:

Hi there,

I recently purchased a new computer where the hard drive is partitioned into a smaller C drive which is just a boot drive and larger D drive which is meant for everything else. I am having trouble because the C drive is the default drive for installation
of new programs, saving user files, etc. but my C drive does not have sufficient space for this. While some programs allow me to choose an alternative address for installation, other programs do not and just use the default drive.

I have tried switching the default under Setting/System/Storage, but the problem persists. I also tried manually editing the program directory via Regedit, but this just caused problems when trying to install new programs as the installations would crash.

I would be very grateful for any advice anyone can offer.

Thanks!

 

Boot error INACCESSIBLE_BOOT_DEVICE, drive letters C: and D: switched

Issue:

Error (blue screen) when booting with stop code (DE Stillstandcode) INACCESSIBLE_BOOT_DEVICE. Computer restarts automatically and then freezes with message “automatic repair being prepared” (DE “Automatische Reparatur wird vorbereitet”). After manual
shut down, the same happens all over again.

System:

Lenovo IdeaPad C340-15IWL with pre-installed Windows 10 (updated to latest version / fixes) with two drives:

128 GB SSD with Windwos and program files (C: “Windows-SDD”)

1 TB HDD as data storage (D: “Data”)

Reason:

Not clear. Just three days before a BIOS update (ALCN28WW V2.05) has been installed, after which the fingerprint scanner didn’t work any longer. Lenovo support suggested to reset BIOS to defaults and re-install driver, which did not solve the problem,
but at least the computer still worked. After another restart, the issue occurred.

Troubleshooting:

1) Loaded default settings in BIOS again
no change.

2) Booted from Win 10 installation USB flash drive, chose repair options (DE “Computerreparaturoptionen”), then troubleshooting (DE “Problembehandlung”), then start help (DE “Starthilfe”)
PC could not be repaired; then chose advance options (DE “Erweiterte Optionen”), command prompt (DE “Eingabeaufforderung”); change to drive C: and D: and could see that all directories are still there, BUT DRIVE LETTERS
ARE SWITCHED: C: shows as “Data” holding all directories formerly under D:, and D: shows as “Windows-SDD” holding all directories formerly under C:

Pretty sure that this switch of drive letters is related to the issue (Windows probably tries to boot from C:, which is the wrong drive now), not idea how this came, and no idea how to switch it back to make Win work again.

Thanks for any helpful suggestion!

 

Boot error INACCESSIBLE_BOOT_DEVICE, drive letters C: and D: switched

Hi,

Thanks for the reply. I did as suggested, but it did not solve the problem.

Not sure from which drive I'm supposed to execute the commands and if this matters at all. When entering command prompt mode, I was on drive X: and can change to C: and D:, I executed first on C:, then on D:, with same result:

BOOTREC /FIXMBR -> process completed

BOOTREC /FIXBOOT -> access denied

BOOTREC /scanos -> 0 Windows installations found

BOOTREC /rebuildbcd -> 0 Windows installations found

As indicated in my original post, drive letters C: (was originally the SSD with Windows and program installations) and D: (was originally the HDD holding data) have somehow switched. When I go to C: in command prompt and execute DIR, it shows me all the
content that was supposed to be on D: and vice versa.

That means, I can find the Windows directory that was supposed on C: under drive letter D: now, which might be a symptom of the issue, or the root cause.

So might it help to switch back drive letters C: and D:, and how can this be done?

Thanks and regards.