Windows 11 Storage Management: Freeing Up Space and Managing Drives

Storage fills up faster than most people expect. Windows Update cache, temporary internet files, hibernation files, old system restore points, downloaded installers that were never deleted, and the accumulated debris of months or years of active use — these can easily consume tens of gigabytes without you ever deliberately saving anything. On an SSD, where capacity is more constrained and performance is linked to available free space, keeping storage under control matters even more.

Windows 11 provides a genuinely capable set of storage management tools, from the automated Storage Sense feature to manual cleanup utilities, drive management through Disk Management and DiskPart, and performance monitoring through tools that show exactly where your space is going. This guide walks through all of them comprehensively.

All features in this guide are available on both Windows 11 Home and Professional. If you are looking to activate a clean Windows 11 installation, Windows 11 Professional is available from GetRenewedTech for £18.99.

Understanding Where Your Storage Goes

Before cleaning anything, understand what is actually taking up space. Windows 11’s storage breakdown is far more detailed than the simple used/free bar chart of earlier Windows versions.

1. Open Settings → System → Storage.
2. The page shows a visual breakdown of your main drive’s usage, divided into categories: Apps & features, Temporary files, Other, OneDrive, Documents, Desktop, Music, Videos, Pictures, and Windows.
3. Click any category to drill into it and see exactly which files are consuming space.

The Temporary files category is often the biggest quick win. Click it to see what is available for cleanup:

• Windows Update Cleanup: Old update installation files that Windows keeps for rollback purposes. If you are satisfied with your current Windows version, this can usually be safely removed.
• Windows Upgrade Log Files: Logs from the last major Windows upgrade.
• Language Resource Files: Language packs for languages other than your primary language.
• Recycle Bin: Files you have deleted but not yet permanently removed.
• Temporary Files: Files in the system and user Temp folders that applications have left behind.
• Thumbnails: Cached thumbnail images for File Explorer. Safe to delete; they are regenerated on next use.
• Downloads: Files in your Downloads folder. Review carefully before deleting — this is one of the few categories that removes files you may actually want to keep.

Storage Sense: Automated Storage Management

Storage Sense automatically frees up space on your drive by deleting temporary files, clearing the Recycle Bin, and managing cloud-available files in OneDrive. It can run automatically when your disk space is low, on a schedule, or manually on demand.

To configure Storage Sense:

1. Go to Settings → System → Storage → Storage Sense.
2. Toggle Storage Sense on.
3. Click Configure Storage Sense or run it now.
4. Set when to run automatically: Every day, Every week, Every month, or During low free disk space (the default).
5. Configure the Recycle Bin cleanup rule: delete files that have been in the Recycle Bin for more than 1 day, 14 days, 30 days, or 60 days.
6. Configure the Downloads folder cleanup rule: delete files in Downloads that have not been opened for 1 day, 14 days, 30 days, or 60 days. Note: Be careful with this setting if your Downloads folder is a long-term store rather than a temporary inbox.
7. Configure OneDrive cloud content: set locally available OneDrive files to become online-only after a specified number of days without being accessed.

Scroll to the bottom and click Run Storage Sense now to trigger an immediate cleanup with your current settings.

Disk Cleanup: The Classic Tool

The traditional Disk Cleanup utility (cleanmgr.exe) predates Windows 10 but remains available in Windows 11 and has access to some cleanup categories not available in the Storage Sense interface — particularly the Windows Update Cleanup and System error memory dump files, which require administrator access.

To run Disk Cleanup with administrator-level cleaning options:

1. Press Win + S, search for Disk Cleanup, right-click it, and select Run as administrator.
2. Select the drive to clean (usually C:).
3. After the initial analysis, click Clean up system files. This re-analyses with elevated access and reveals additional categories.
4. Tick the categories you want to clean. Categories worth particular attention:
   • Windows Update Cleanup: Often several GB on systems that have received many updates
   • Device driver packages: Old driver backups
   • Previous Windows installation(s): The Windows.old folder left after an in-place upgrade — can be 10-20 GB or more
5. Click OK and confirm deletion.

Finding and Removing Large Files

When Storage Sense and Disk Cleanup are not enough, the next step is identifying large files you might have forgotten about. Windows does not include a built-in disk space analyser, but two excellent free tools serve this purpose:

• WinDirStat: Visualises your entire drive as a treemap where file size is represented by block area. Immediately obvious which directories and file types are consuming the most space.
• TreeSize Free: Shows folder sizes in a sortable tree view. Faster than WinDirStat on large drives.

Common large file culprits to look for:

• Hibernation file (C:\hiberfil.sys): Equal to your total RAM in size. If you never use Hibernate, disable it to reclaim this space: open Command Prompt as administrator and run powercfg /hibernate off.
• Page file (C:\pagefile.sys): The virtual memory swap file. Usually managed automatically by Windows at an appropriate size — do not delete it, but you can move it to a secondary drive.
• Windows.old folder: Left over from OS upgrades. Safe to delete via Disk Cleanup after confirming the new Windows version is working correctly.
• Large video files in unexpected locations: Screen recordings from Snipping Tool, OBS, or Xbox Game Bar often accumulate in your Videos folder.

Managing the Windows Page File

The page file (virtual memory) is managed automatically by Windows, but you can adjust its configuration:

1. Press Win + R, type sysdm.cpl, and open the Advanced tab.
2. Click Settings under Performance, then the Advanced tab.
3. Click Change under Virtual memory.
4. Untick Automatically manage paging file size for all drives to take manual control.

If you have two drives — a smaller, faster SSD (C:) and a larger, slower HDD (D:) — consider moving the page file to the HDD to free space on the SSD. The performance impact is minimal on systems with 16 GB or more of RAM, as the page file is rarely used heavily.

Disk Management: Partitions, Volumes, and Drive Letters

Disk Management is the graphical tool for creating, resizing, and managing partitions. Open it by pressing Win + X and selecting Disk Management.

Shrinking a Volume to Create New Space

1. Right-click the volume you want to shrink (e.g., C:) and select Shrink Volume.
2. Windows calculates the maximum shrink amount — this is limited by unmoveable files. Defragmenting the drive first can sometimes increase the available shrink amount.
3. Enter the amount to shrink in MB and click Shrink.
4. The freed space appears as Unallocated.

Creating a New Partition

1. Right-click the unallocated space and select New Simple Volume.
2. Follow the wizard to set the size, assign a drive letter, and choose the file system (NTFS for Windows data volumes; exFAT for cross-platform compatibility with macOS and Linux).

Extending a Volume

1. Right-click the volume you want to extend and select Extend Volume.
2. You can extend a volume using unallocated space on the same disk. Note that the unallocated space must be adjacent to the volume for a basic partition extension.

Using DiskPart for Advanced Disk Operations

DiskPart is the command-line equivalent of Disk Management and provides operations not available in the GUI. Run diskpart in Command Prompt as administrator.

DISKPART> list disk
DISKPART> select disk 1
DISKPART> list partition
DISKPART> select partition 2
DISKPART> detail partition

DiskPart is particularly useful for cleaning drives before reuse, converting between MBR and GPT partition styles, and managing disks in Windows PE (pre-installation environment). Use it with care — mistakes are difficult to reverse.

Optimising SSDs: What to Do (and Not Do)

SSDs need different maintenance than traditional hard drives. Windows 11 handles most SSD optimisation automatically, but understanding the process helps you avoid common mistakes:

• TRIM is handled automatically. Windows runs scheduled TRIM operations on SSDs through the Optimise Drives tool (formerly Disk Defragmenter). Do not defragment SSDs — Windows correctly identifies them as SSDs and sends TRIM commands instead of defragmenting.
• Keep 10-20% free space. SSDs perform best with some free space available for wear-levelling operations. Filling an SSD to 95%+ capacity noticeably degrades both performance and longevity.
• Enable write caching if appropriate. In Device Manager, find your SSD under Disk Drives, right-click → Properties → Policies tab. Write caching improves performance but requires a reliable power supply. On UPS-protected desktop systems it is generally safe; on laptops, Windows manages this automatically.

Checking Drive Health

Monitoring drive health before a failure occurs is essential for avoiding data loss. Windows 11 includes basic drive status reporting, but third-party tools provide more detailed S.M.A.R.T. (Self-Monitoring, Analysis and Reporting Technology) data:

• CrystalDiskInfo: Free tool that displays full S.M.A.R.T. data for all attached drives, including reallocated sectors, pending sectors, and uncorrectable errors — the key indicators of impending failure.
• Windows Event Viewer: Disk errors often appear in the System log before a drive fails completely. Look for events from the disk source with error level indicators.

Run a check disk scan to detect and repair file system errors: open Command Prompt as administrator and run chkdsk C: /f /r. The /f flag fixes errors and /r locates bad sectors and recovers readable data. On the active system drive, this requires a restart to run at boot time.

Moving Applications to a Different Drive

If your system drive is running low but you have a larger secondary drive, you can move some installed applications:

1. Go to Settings → Apps → Installed apps.
2. Find an application, click the three-dot menu next to it, and select Move.
3. Select the destination drive and click Move.

Not all applications support this — the Move option only appears for applications installed via the Microsoft Store or as packaged apps. Traditional Win32 applications installed from executable files generally cannot be moved this way without reinstalling to the new location.

You can, however, change the default installation location for new apps: go to Settings → System → Storage → Advanced storage settings → Where new content is saved and change the default app installation drive to your secondary drive.

OneDrive Files On-Demand

If you use OneDrive, Files On-Demand allows your OneDrive files to appear in File Explorer without actually taking up local storage space. Files are downloaded only when you open them.

To configure which files are stored locally versus cloud-only: right-click any OneDrive folder or file in File Explorer and look for Free up space (makes it cloud-only, freeing local storage) or Always keep on this device (ensures it is always available offline).

For users who have moved large libraries — photos, videos, documents — to OneDrive, this feature can recover gigabytes of local storage while keeping everything accessible.

Summary

Windows 11’s storage management tools cover the full spectrum from automated maintenance to surgical file-level cleanup. The recommended workflow is:

1. Start with Settings → System → Storage for a quick overview and easy Temporary files cleanup.
2. Enable Storage Sense on a weekly or monthly schedule to automate ongoing maintenance.
3. Run Disk Cleanup as administrator to access the Windows Update Cleanup and system file categories.
4. Use a third-party analyser like WinDirStat or TreeSize to identify any large unexplained files.
5. Consider disabling hibernation if you do not use it.
6. Monitor drive health regularly with CrystalDiskInfo and run chkdsk at the first sign of errors.

Follow this workflow and your system will stay lean, fast, and reliable. Windows 11 Professional is available from GetRenewedTech for £18.99.