I've been able to gain 5GB of space by using File Explorer properties to compact the following folders
Users
Windows
Program Files
Program files (x86)
ProgramData
and intend to try the other folders.
The command compact /compact:query told me the system WAS in the compact state. But most files were not compacted.
File Explorer shows me which folders are compacted by putting them in blue

Users
Windows
Program Files
Program files (x86)
ProgramData
and intend to try the other folders.
The command compact /compact:query told me the system WAS in the compact state. But most files were not compacted.
File Explorer shows me which folders are compacted by putting them in blue

My Computers
System One System Two
-
- OS
- Windows 11 Pro 24H2 26100.3915
- Computer type
- Laptop
- Manufacturer/Model
- Acer Swift SF114-34
- CPU
- Pentium Silver N6000 1.10GHz
- Memory
- 4GB
- Screen Resolution
- 1920 x 1080
- Hard Drives
- SSD 2TB
- Cooling
- fanless
- Internet Speed
- 150 Mbps
- Browser
- Brave
- Antivirus
- Webroot Secure Anywhere
- Other Info
- System 3
ASUS T100TA Transformer
Processor Intel Atom Z3740 @ 1.33GHz
Installed RAM 2.00 GB (1.89 GB usable)
System type 32-bit operating system, x64-based processor
Edition Windows 10 Home
Version 22H2 build 19045.3570
-
- Operating System
- Windows 11 Pro 23H2 22631.2506
- Computer type
- Laptop
- Manufacturer/Model
- HP Mini 210-1090NR PC (bought in late 2009!)
- CPU
- Atom N450 1.66GHz
- Memory
- 2GB
- Browser
- Brave
- Antivirus
- Webroot