Where the space usually goes
On a system that has been in use for a couple of years, the largest files are almost never in the folders people check first. They are video exports from a phone, virtual machine disks, game libraries, old installers and ISO images — files measured in gigabytes each, created once and forgotten. Downloads is the single most neglected folder on most machines.
A separate league is system files: hiberfil.sys (hibernation, about 40% of RAM by default), pagefile.sys and the WinSxS component store. In a size-sorted list they look like prime targets but must not be deleted by hand — each has a supported off-switch, from powercfg /h off to DISM, and a dedicated article. Handled the supported way, they give back a few gigabytes at most, so they belong at the end of the cleanup list, not the top.
- Video from phones and cameras — 1–4 GB per clip, dozens per folder
- Game installs: a single modern AAA title claims 100–150 GB
- Virtual machine disks and container images — a single VHDX can hold 20–80 GB
- Downloads: old ISO images, installers and archives nobody opened twice
- Cloud-synced files cached locally — they count until marked online-only
- hiberfil.sys and pagefile.sys — system-managed, off-limits to manual deletion
Finding them with File Explorer and Storage settings
Open the drive you want to audit and click into the search box. Typing size:gigantic lists everything over 4 GB on that drive and all its subfolders; size:huge covers 1–4 GB and size:large 128 MB–1 GB. Run the search, switch to the Details view and click the Size column to sort. Searching at the drive root covers the entire drive, including hidden folders — protected system files stay invisible.
For a category overview, open Settings → System → Storage. Windows breaks usage into apps, temporary files, games and more, and “Show more categories” adds documents, videos and pictures; each category opens with a delete or manage option. It answers “what is taking up the space” without hunting file by file.
Mapping the whole disk and acting on the results
Search filters find files, not folders. To see which folders dominate, run a free tree-map tool: WizTree reads the NTFS master file table directly and shows the whole drive in seconds; WinDirStat and TreeSize Free do the same by walking the tree. The visual blocks make a 60 GB Downloads folder impossible to miss.
Acting on the list is mechanical: move media and archives to another drive, delete duplicates and stale installers, trim caches with the tools Windows gives you. Be conservative with anything under C:\Windows and Program Files — deleting there breaks more than it frees. Storage Sense or a scheduled cleanup in Kleaner PRO keeps the drive from silently refilling, and a quarterly ten-minute audit is enough to stay ahead.
Questions and Answers
How do I find files larger than 1 GB in Windows 11?
Type size:huge (1–4 GB) or size:gigantic (over 4 GB) in the search box of the drive, then sort results by the Size column. The filter includes all subfolders.
What is taking up all the space on my C: drive?
Settings → System → Storage shows usage by category, and a tool like WizTree maps every folder. On most machines the answer is games, videos and Downloads, not Windows itself.
Can I delete hiberfil.sys or pagefile.sys to free space?
Not by deleting them: hiberfil.sys shrinks or disappears when hibernation is disabled with powercfg /h off, and the pagefile is managed through virtual memory settings — both are covered in separate articles.
Know what is included before you buy.
The one-time 30-minute trial covers core tools. PRO-labelled features stay locked until a paid license is activated.
Read next
Write to us: [email protected]