Space and capacity.
WHAT THE UNITS MEAN
Each step is roughly a thousand times the previous one.
A document is small. A photograph is larger. A video is far larger again.
WHAT THAT MEANS PRACTICALLY
Thousands of documents occupy less space than a handful of videos.
WHAT CONSUMES SPACE MOST
Video Photographs Downloads never deleted Program installations System files and updates
WHAT TO CHECK
How much space remains on your machine.
WHY IT MATTERS
A nearly full disk makes everything slow and eventually prevents work entirely.
WHAT TO KEEP FREE
A reasonable margin, not the last few percent.
THE TWO KINDS OF STORAGE
Mechanical drives, cheaper and slower Solid-state drives, faster and more expensive
WHAT THAT AFFECTS
How quickly the machine starts and opens things.
Replacing a mechanical drive with a solid-state one transforms an older computer more than any other upgrade.
WHAT TO DO ABOUT A FULL DISK
Find what is consuming space, before buying more.