Can anyone tell me how to add unused Partitions to drive C:\

MikeHawthorne · Apr 24, 2026

I'm getting really tight on free space on drive C:\ I can't find anything that tells my how to do it?
Is it possible it seems that I could combine them some how, on of them is right next to C:\.
Hers a screen shot of Memory Manager!

I'd like to at least move the 800 MB partition to the C:\ drive. Better would be adding the 800 and 600 MB one.
The Recovery partitions ae empty.

MikeHawthorne · Apr 25, 2026

I continued looking foR things I could move fRom UseRs I found a foldeR that has saves foR CybeR Punk 2077 and it had 9 Gigs of save files.
I went in and deleted almost all the saves except the fiRst and last few.

This saved me almost 9 Gigs of space and when I staRted the game is woRked fine.

That's enough to keep things Running fo now. That seems to be the only game I have that put it's saves on C:\ but it's something at least.

WindowsForum AI · Apr 24, 2026

Mike, yes — it is possible to reclaim some space, but not the way Windows Disk Management is laid out right now.

What your screenshot shows

On Disk 0, the order is roughly:

100 MB EFI System Partition
Windows 11 (C — 197.60 GB, only 5.30 GB free
800 MB Recovery partition
16 MB tiny partition
F: — 732.42 GB
604 MB Recovery partition

The key problem

Windows can only extend C: into unallocated space immediately to its right.
Right now, the 800 MB Recovery partition is directly to the right of C:, so:

You cannot add the 604 MB partition to C: with Disk Management.
You cannot add space from F: to C: with Disk Management.
You could only add 800 MB if that partition were deleted first — and that gain is tiny.

My recommendation

Because C: only has 5.3 GB free, recovering 800 MB is not worth the risk by itself.
You have a much better fix available:

D: has about 489 GB free
F: has about 623 GB free

So the safest and most useful move is to move data off C: instead of trying to merge those small system partitions.

Best option: free space on C: safely

1) Move your user folders to F: or D:

Move things like:

Downloads
Documents
Pictures
Desktop
Videos

Steps

Open File Explorer
Right-click Downloads under your user profile
Click Properties
Open the Location tab
Click Move
Choose a folder on F: or D:
Repeat for the other large folders

This usually frees far more space than those little partitions ever will.

2) Uninstall or move large apps/games from C:

Especially move:

Adobe caches / scratch files
big games
video/photo libraries
download folders

3) Run built-in cleanup

Open Settings → System → Storage
Open Temporary files
Remove what you do not need
Turn on Storage Sense

4) If you do not use hibernate

Open Command Prompt as Administrator and run:
powercfg -h off
That can free several GB immediately.
Warning: this disables hibernation and Fast Startup.

About those partitions

Do not touch the 100 MB EFI partition

That partition is boot-critical. Deleting or repurposing boot/system partitions can leave Windows unbootable, which is why older partitioning guidance consistently warns against removing the system-reserved/boot partition. 04 MB partitions are probably recovery-related
You likely have two recovery partitions because of past upgrades/repairs.
One of them may be obsolete, but you should not guess which one.

Check which recovery partition Windows is actually using

Open Command Prompt as Administrator and run:
reagentc /info
Look for the Windows RE location.
If it points to the 604 MB partition, then the 800 MB one may be old.
If it points to the 800 MB partition, then leave it alone.

If you absolutely want to grow C:

This is the more advanced route.

What would have to happen

To give C: meaningful extra space, you would need a partition tool that can:

Shrink F: from the left
Move the 16 MB and 800 MB partitions
Then extend C: into the newly adjacent free space

That is not something Disk Management can do. Once free space is not directly adjacent, you generally need a partition manager that can move partitions, not just resize them.

Risks

Before doigly recommend:

Back up F:
Back up anything important on C:
Create a system image or at least a restore point
Be prepared for a long operation if F: contains a lot of data

My honest advice

I would not do this:

delete partitions blindly
try to merge the 604 MB partition into C:
touch the 100 MB EFI partition

I would do this:

Move your personal folders from C: to F: or D:
Clean up temp/system files
Check reagentc /info
Only if you still need more space, consider a proper partition move/resize plan

If you want, I can give you:

a safe cleanup checklist to free 20–50 GB on C:, or
a step-by-step partition plan based on your exact layout.

MikeHawthorne · Apr 24, 2026

I've already done all of those things all of my software that I can control is installed on other drives.
I have to constantly delete things that automatically get added to Users.

Is thee anyway to move the UseRs folder to another DRive

As you can see I'm still fighting the R pRoblem as well!

WindowsForum AI · Apr 24, 2026

Mike — yes, parts of C:\Users can be moved, but moving the entire Users folder on an existing Windows install is not recommended.
That usually causes trouble with:

Windows updates
Microsoft Store apps
profiles
permissions
future repairs/upgrades

Short answer

Do not try to move all of `C:\Users` manually

The safer approach is:

Move the big user folders
Move OneDrive/Downloads/Desktop/Documents/Pictures/Videos
Redirect temp folders
Find what inside AppData is bloating C:

Best safe options

1) Move your user folders properly

For each of these:

Desktop
Documents
Downloads
Pictures
Music
Videos

Do this:

Open File Explorer
Go to C:\Users\YourName
Right-click the folder, such as Downloads
Click Properties
Open the Location tab
Click Move
Choose a folder on D: or F:
Let Windows move the contents

That is the supported way to move the biggest parts of Users.

2) Move OneDrive if you use it

OneDrive often eats space under your profile.

Right-click the OneDrive icon
Open Settings
Unlink this PC
Sign in again
When asked for the folder location, choose a folder on D: or F:

3) Move browser downloads/cache targets

Browsers often keep a lot under Users.

Chrome / Edge

Open browser Settings
Change Downloads location to D: or F:
Clear browser cache

4) Move TEMP and TMP

This can help, especially if Adobe or installers dump a lot of junk there.

User temp

Press Win + R
Type sysdm.cpl
Open Advanced
Click Environment Variables
Change TEMP and TMP under your user account to something like:
- D:\Temp
Create that folder first
Reboot

System temp

You can also move the system TEMP/TMP, but do the user ones first.

5) Find what inside `Users` is actually huge

The real problem is usually not the obvious folders — it is often:

C:\Users\YourName\AppData\Local
C:\Users\YourName\AppData\Roaming
browser caches
Adobe caches
installer leftovers
game launchers
crash dumps

Best way to check

Use a size scanner such as:

TreeSize Free
WinDirStat

Then look specifically at:

C:\Users\YourName\AppData\Local
C:\ProgramData
C:\Windows\Temp

If you want, I can help you interpret the results safely before you delete anything.

About moving the entire `Users` folder

Possible? Technically yes.

Good idea on an already-running system? No.

It is the kind of change that can leave you with:

broken logins
broken updates
broken app permissions
weird profile issues later

If someone truly wants Users on another drive, the clean way is usually done during a fresh Windows install, not after the fact.

If C: is still critically low

Since your C: only has a few GB free, I would do this next:

1) Check `AppData`

Press Win + R
Enter:
%localappdata%
Sort by size
Look for giant folders

2) Check temp folders

Press Win + R
Enter:
%temp%
Delete what will delete
Skip files in use

3) Check ProgramData

Open:
C:\ProgramData
Look for large app caches

My recommendation

Do this first

Move all standard profile folders with the Location tab
Move OneDrive
Move TEMP/TMP
Scan C:\Users with TreeSize or WinDirStat

Do not do this first

Do not manually drag the whole Users folder to another drive
Do not rename profile paths in the registry unless you are prepared for breakage

About the R problem

And yes — your UseRs / DRive typing here is more evidence that the issue is this forum editor, not your keyboard. Since you already proved the search box works but the post editor fails, that still points to the site editor specifically.
If you want, next reply I can give you:

a safe checklist to move the biggest parts of Users, or
a step-by-step guide to find exactly what in AppData is filling C:.

MikeHawthorne · Apr 24, 2026

I'll tRy some of this stuff, and see what happens.

WindowsForum AI · Apr 24, 2026

Sounds good, Mike.

I’d try these in this order

Move the standard folders with the Location tab:
- Downloads
- Documents
- Pictures
- Desktop
- Videos
Check these folders for bloat:
- %localappdata%
- %temp%
- C:\ProgramData
Move your user TEMP/TMP folders to another drive.
If you use OneDrive, move its storage location too.

Most important warning

Do not try to move the entire C:\Users folder unless you are prepared for update/profile problems.

Best next step if space is still disappearing

If you can, install TreeSize Free or WinDirStat and scan:

Code:

C:\
C:\Users
C:\Users\YourName\AppData
C:\ProgramData

That will usually show the real culprit very quickly.

If you want

After you try it, post back with either:

What freed up the most space, or
A screenshot/list of the biggest folders under AppData

…and I’ll help you sort out what is safe to remove or move.
And yes, your tRy is still more proof the forum editor is the one acting up, not your keyboard.

MikeHawthorne · Apr 25, 2026

I continued looking foR things I could move fRom UseRs I found a foldeR that has saves foR CybeR Punk 2077 and it had 9 Gigs of save files.
I went in and deleted almost all the saves except the fiRst and last few.

This saved me almost 9 Gigs of space and when I staRted the game is woRked fine.

That's enough to keep things Running fo now. That seems to be the only game I have that put it's saves on C:\ but it's something at least.

WindowsForum AI · Apr 25, 2026

Nice catch, Mike — 9 GB from one game’s save folder is a big win.
That absolutely explains why C:\Users kept filling up even though you were already moving the obvious stuff off C:.

Why this happened

A lot of games still store saves here instead of on the game drive:

Code:

C:\Users\<YourName>\Saved Games
C:\Users\<YourName>\Documents
C:\Users\<YourName>\AppData\Local
C:\Users\<YourName>\AppData\Roaming

So even when the game itself is installed on D: or F:, the saves, configs, screenshots, shader caches, and mods can still pile up on C:.

Good news

If Cyberpunk still starts and loads properly after deleting the old saves, then you likely removed only excess save history and kept the active profile intact.

What I’d do next

1) Make a quick backup of the remaining good saves

Copy the remaining Cyberpunk save folder to D: or F: just in case.

2) Check other likely game folders

Look in:

Code:

C:\Users\<YourName>\Saved Games
C:\Users\<YourName>\Documents
C:\Users\<YourName>\AppData\Local
C:\Users\<YourName>\AppData\Roaming

Look for folders from:

Steam
GOG
CD Projekt Red
Rockstar
Ubisoft
EA
Epic

3) Watch for screenshot folders too

Games sometimes dump huge screenshot/video folders under Documents or Videos.

Best long-term approach

Now that you have breathing room, the next time space gets tight:

Run TreeSize Free or WinDirStat
Scan C:\Users
Sort by size
Hunt down the biggest game/app folders first

That is usually much safer and more productive than trying to rework partitions.

Bottom line

You found the kind of hidden space hog that causes exactly this problem.
9 GB back on C: is a solid temporary fix, and since the game still works, you handled it correctly.
If you want, I can next give you a short checklist of the most common game-related folders on C: to inspect.

MikeHawthorne · Apr 25, 2026

MikeHawthorne said:
I continued looking foR things I could move fRom UseRs I found a foldeR that has saves foR CybeR Punk 2077 and it had 9 Gigs of save files.
I went in and deleted almost all the saves except the fiRst and last few.

This saved me almost 9 Gigs of space and when I staRted the game is woRked fine.

That's enough to keep things Running fo now. That seems to be the only game I have that put it's saves on C:\ but it's something at least.

PS, I've been putting my Windows files on a 200 gig partition foR yeaRs and neveR had a space pRoblem befoRe.

Can anyone tell me how to add unused Partitions to drive C:\

Essential Member

AI

What your screenshot shows​

The key problem​

My recommendation​

Best option: free space on C: safely​

1) Move your user folders to F: or D:​

Steps​

2) Uninstall or move large apps/games from C:​

3) Run built-in cleanup​

4) If you do not use hibernate​

About those partitions​

Do not touch the 100 MB EFI partition​

Check which recovery partition Windows is actually using​

If you absolutely want to grow C:​

What would have to happen​

Risks​

My honest advice​

I would not do this:​

I would do this:​

Essential Member

AI

Short answer​

Do not try to move all of C:\Users manually​

Best safe options​

1) Move your user folders properly​

2) Move OneDrive if you use it​

3) Move browser downloads/cache targets​

Chrome / Edge​

4) Move TEMP and TMP​

User temp​

System temp​

5) Find what inside Users is actually huge​

Best way to check​

About moving the entire Users folder​

Possible? Technically yes.​

Good idea on an already-running system? No.​

If C: is still critically low​

1) Check AppData​

2) Check temp folders​

3) Check ProgramData​

My recommendation​

Do this first​

Do not do this first​

About the R problem​

Essential Member

AI

I’d try these in this order​

Most important warning​

Best next step if space is still disappearing​

If you want​

Essential Member

AI

Why this happened​

Good news​

What I’d do next​

1) Make a quick backup of the remaining good saves​

2) Check other likely game folders​

3) Watch for screenshot folders too​

Best long-term approach​

Bottom line​

Essential Member

What your screenshot shows

The key problem

My recommendation

Best option: free space on C: safely

1) Move your user folders to F: or D:

Steps

2) Uninstall or move large apps/games from C:

3) Run built-in cleanup

4) If you do not use hibernate

About those partitions

Do not touch the 100 MB EFI partition

Check which recovery partition Windows is actually using

If you absolutely want to grow C:

What would have to happen

Risks

My honest advice

I would not do this:

I would do this:

Short answer

Do not try to move all of `C:\Users` manually

Best safe options

1) Move your user folders properly

2) Move OneDrive if you use it

3) Move browser downloads/cache targets

Chrome / Edge

4) Move TEMP and TMP

User temp

System temp

5) Find what inside `Users` is actually huge

Best way to check

About moving the entire `Users` folder

Possible? Technically yes.

Good idea on an already-running system? No.

If C: is still critically low

1) Check `AppData`

2) Check temp folders

3) Check ProgramData

My recommendation

Do this first

Do not do this first

About the R problem

I’d try these in this order

Most important warning

Best next step if space is still disappearing

If you want

Why this happened

Good news

What I’d do next

1) Make a quick backup of the remaining good saves

2) Check other likely game folders

3) Watch for screenshot folders too

Best long-term approach

Bottom line