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My desktop PC with Windows 10 has very little space on my C: drive but lots of space on my D: drive. I am unable to install Firefox on my D: drive.

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I am not a techie.

My C drive has only 55MB free of 118 GB. Having trouble figuring out what I can move from C to D drive. Already removed Firefox from the C drive and uninstalled it.

However, I have 805GB free of 1.8TB on the D drive. So I want to install Firefox on the D drive.

Running into problems.

I used Chrome to download Firefox, and I saved the Firefox Installer.exe file to my D drive.

I saw here https://support.mozilla.org/en-US/kb/custom-installation-firefox-on-windows#w_choose-where-firefox-is-installed that:

C:\Program Files\Mozilla Firefox\ is the default folder path . . .You can change the folder where Firefox will be installed either by . . . However, I never get as far as that setup wizard.

I can click the .exe file in Windows explorer. I get a screen asking, “Do you want to allow this app to make changes . . .” I click yes. I get a message from the Installer, “You don’t have sufficient disk space to install.”

I assume it is responding to the lack of space on the C drive, and it is not even giving me a chance to specify the D drive.

What can I do (in advance of figuring out how to clear space on my C drive)?

Thank you, thank you, thank you! Robert

I am not a techie. My C drive has only 55MB free of 118 GB. Having trouble figuring out what I can move from C to D drive. Already removed Firefox from the C drive and uninstalled it. However, I have 805GB free of 1.8TB on the D drive. So I want to install Firefox on the D drive. Running into problems. I used Chrome to download Firefox, and I saved the Firefox Installer.exe file to my D drive. I saw here https://support.mozilla.org/en-US/kb/custom-installation-firefox-on-windows#w_choose-where-firefox-is-installed that: C:\Program Files\Mozilla Firefox\ is the default folder path . . .You can change the folder where Firefox will be installed either by . . . However, I never get as far as that setup wizard. I can click the .exe file in Windows explorer. I get a screen asking, “Do you want to allow this app to make changes . . .” I click yes. I get a message from the Installer, “You don’t have sufficient disk space to install.” I assume it is responding to the lack of space on the C drive, and it is not even giving me a chance to specify the D drive. What can I do (in advance of figuring out how to clear space on my C drive)? Thank you, thank you, thank you! Robert

Chosen solution

The Firefox installer is a compressed 7-ZIP archive and uses the system TEMP folder (%TMP%, %TEMP%) during the installation, so you would have to move the temp folder as well to the D-drive or make extra room on the C-drive (that is still recommended).

Note that Firefox creates its profile folder on the main system drive (C:\), so you need to use the Profile Manager to create a new profile on the D-drive when you first start Firefox. Firefox will store profiles.ini and installs.ini on the C-drive, but all other files will be stored on the D-drive in the folder you specify. If you use "Choose Folder" then you need to create a new empty folder on the D-drive that will used by Firefox on beforehand. Never specify a folder that has other files in it.

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All Replies (7)

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Hi rtolmach, Wouldn't it be easier to shrink the volume of D: drive with Computer Management?

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Thanks for the reply! And congrats on your "Top-10 Contributor status. How very generous of you!

If I were tech-savvy, I assume that would be easier, and I guess I need to figure out the root problem, somehow, even aside from Firefox. Because you capitalized "Computer Management," I assume it is a program of some sort. I entered that in the Windows search box, and it took me to a tool with that name. I found my way to Store / Disk Management, and I see there that I have very little free space on the C drive, but I do not see any indication of what I can do about it.

I know, this is a Firefox forum, and my real problem is the lack of space on the C drive, not a Firefox problem.

All my best Robert

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I'm glad that you found it. I really meant to say Disk Management.

I thought that you might be back and, considering that you are "not a techie" I looked up an article for you.

These folks at HowToGeek like to keep things simple, also, and they won't lead you the wrong way. Take a look.

How to Manage Partitions on Windows https://www.howtogeek.com/101862/how-to-manage-partitions-on-windows-without-downloading-any-other-software/

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Chosen Solution

The Firefox installer is a compressed 7-ZIP archive and uses the system TEMP folder (%TMP%, %TEMP%) during the installation, so you would have to move the temp folder as well to the D-drive or make extra room on the C-drive (that is still recommended).

Note that Firefox creates its profile folder on the main system drive (C:\), so you need to use the Profile Manager to create a new profile on the D-drive when you first start Firefox. Firefox will store profiles.ini and installs.ini on the C-drive, but all other files will be stored on the D-drive in the folder you specify. If you use "Choose Folder" then you need to create a new empty folder on the D-drive that will used by Firefox on beforehand. Never specify a folder that has other files in it.

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Hi My_Cheese_Is_Slippin

Thank you for that. Wow, a clearly written article. What a delight!

If I am reading it correctly, this would let me reallocate space and change the size of my C: and D: drives if they were partitions on the same piece of hardware.

However, they are separate drives. The C: is a 118 GB SSD, and the 1.8TB D: drive is a traditional hard drive.

So I guess I need to find a way to uninstall something from the C: drive and reinstall it on the D: drive without doing any damage.

Perhaps it would be better to spend $75 or so for a 500GB SSD. I just spoke with B&H Photo, and they said that I can buy a larger SSD, clone the old one, and not have to reinstall everything.

Thank you again! Robert

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Hello cor-el

Thank you very much. Another TOP 10 CONTRIBUTOR! You guys are so incredibly generous.

Thank you for the explanation. I will save it for another time, but I think that buying the larger SSD is the way to go.

All my best wishes Robert

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Hello rtolmach, It seems that you are already using 1.1TB of disk space. I would agree with the idea of getting a larger SSD, if not simply for the sake of having the disk space available for the future.

Good luck with everything. And post back again if there is anything that we can help you with.

Browse Safe!