Import .DAT file in rhino

Is it possible to import .dat file (from smart plant 3d) in rhino? File size is 8gb.

Hi - no, the .dat file format is not on the list of supported formats.
https://docs.mcneel.com/rhino/6/help/en-us/index.htm#fileio/_index_of_import_export_file_types.htm
-wim