Based on standard naming conventions, here is how the text breaks down:
This filename appears to be an archive of project or transaction data spanning from June 8, 2021, to June 15, 2021. File: DoubleP_210608-210615.zip ...
"Compressed archive containing [Project Name/Data Type] records for the period of June 8, 2021, through June 15, 2021." Based on standard naming conventions, here is how
: A compressed folder containing multiple files to save space and keep them together. Based on standard naming conventions