Once you pass the drive's actual physical limit (e.g., 8GB), the drive begins overwriting the old data to make room for the new data.
Use services like Google Drive, OneDrive, or Dropbox. These give you actual extra gigabytes that exist on a remote server.
Use the built-in "Disk Cleanup" tool or "Storage Sense" in Windows to delete temporary files that are hogging space.
Searching for keywords like "Ultimate Drive Increaser Size 100 Link" often leads to dangerous corners of the internet. These downloads are primary vectors for: