Files
WizTree
Find what is taking up space on your Windows drive
Desktop appFree personal use · commercial licence paid
Open WizTree Why this one
See which files and folders occupy the most space before deciding what to move or remove. This answers a different question from searching for a filename you already remember.
Try this first
Scan the relevant drive and inspect its largest files in the size map. Open the containing folder to identify a file before making any changes.