...
But how much space is this really?
GB 1GB (gigabyte) is 1,000MB (megabytes), 1MB is 1,000KB (kilobyte)*. A typical Word document without pictures is less than 50KB.*.
*Depending on the computer system, the values above are expressed as either 1,000 or 1,024. This does not affect your usage of OneDrive or your computer.
...