This folder contains files with hds file extension (e.g. Windows 8.1-0.hdd.0.{8e6db9d6-d651-4fe7-91fb-eba5d3ba770c}). There are almost 10 files of total size 160 GB. This is consuming a large size of the startup drive which is 240 GB. Are they required to be kept or I can delete them? The attached document elaborates the problem.