Cannot move Lightroom Classic to another drive

[christied55866019]

HELP! I uninstalled Lightroom Classic from my C-drive because it is critically full. I tried to reinstall it on my external drive or my SSD drive, but I keep getting a "root path" error message. I have Illustrator on my external drive with no issues, so I don't understand why Lightroom won't add. (I have plenty of storage available on it) Any ideas on what I'm doing wrong and how to fix the issue are greatly appreciated!! THANK  YOU!

[Rob_Cullen]

Unlike other apps I don't believe that Lightroom-Classic app can be installed on another drive. (Others might prove me wrong)

You can however move the catalog, the catalog previews, and all photo files, to another drive. 

Creative Cloud must be on C:drive, and the LrC install occupies about 4GB of space. It is the previews cache that can occupy far more space.

MOVING A CATALOG  

And refer the the LrC User Guide:  https://helpx.adobe.com/support/lightroom-classic.html?mv=product&mv2=lr#

[GoldingD]

Bring up Google and search on:

adobe lightroom classic modify installation drive

[dj_paige]

I'm pretty sure Lightroom Classic can be installed on an external or SSD drive. See https://helpx.adobe.com/download-install/apps/manage-installed-apps/change-install-location-creative...

If your photos or catalog file is on the C: drive, I would move those to a different drive before you re-install the software on a different drive.

Please provide the complete unedited word-for-word error message.

[christied55866019]

Thank you so VERY much for helping me. I tried again, and it only installed to 1% before I got the "installation failed" message. Here is the full error report. THANK YOU!

Exit Code: 120
-------------------------------------- Summary --------------------------------------
 - 2 fatal error(s), 3 error(s), 9 warnings(s) 

FATAL: Fatal Error '120' occurred while download
FATAL: Error occurred in download of package (Name: AdobeLightroom-mul Version: 14.0.1.202410161356). Error code: '120' 
ERROR: Path:G:\adobeTemp already exists
ERROR: CreateDirectory failed. Error: 1307
ERROR: CreateDirectory failed. Error: 1307
WARN: GetIEProxyInfo - Failed to get proxy for the url, error:12180
WARN: GetIEProxyInfo - Failed to get proxy for the url, error:12180
WARN: Failed to create a dir G:\adobeTemp\ETR739E.tmp with permission from: G:\1, applying fallback to temp
WARN: No open ZIP file to close
WARN: Failed to close the currently open file in the ZIP archive.
WARN: Failed to close the ZIP archive.
WARN: No open ZIP file to close
WARN: Failed to close the currently open file in the ZIP archive.
WARN: Failed to close the ZIP archive.

[AxelMatt]

FATAL: Fatal Error '120' occurred while download
FATAL: Error occurred in download of package (Name: AdobeLightroom-mul Version: 14.0.1.202410161356). Error code: '120' 

By @christied55866019

The error code means that there's not enough free diskspace on the drive with the download path.

Please check your free space.

Check also your access rights to the external driv. Do <you have full access to the drive?

Check your environment variable tmp and temp. Which folders do the variables point to.

Press the Windows key + R then type in cmd and press return.

On the prompt type "set" and press return. You should see a output similar to the screensshot below.