<s>[INST] Two separate files are placed in a laptop: file A and file B. Each file has the same size, which is x MB (megabyte). When we remove file A, the laptop's Disk space decreased by x MB. However, when we remove file B, the laptop's Disk space decreased by 2x MB, instead of x MB. What could be the reasons why the decrease in disk space is different?[/INST]