.SHD File Extension
File TypeWindows Print Job Shadow File
What is an SHD file?
File created by Windows when a user submits a print job; stores header information for a print job, but does not store the actual spooled document data; allows the print job settings to be "shadowed" so that the job can be resubmitted again if there is an interruption.
SHD files are created alongside .SPL files, which contain the spooled print data. Both SHD and SPL files are written to the following directory when a print job is submitted: C:\Windows\System32\spool\PRINTERS\.