: This is likely the core filename. While it doesn't match a standard global software package, "ECW" often refers to Enhanced Compression Wavelet , a format used for massive satellite or aerial imagery. If this is a project file, it might contain high-resolution maps or geographic data.
If you have downloaded this file and want to see what is inside: Download ecwys (12) (1) zip
: These are automatic suffix additions from a web browser or operating system. They indicate that you (or someone using the computer) have downloaded a file with the same name at least 12 times previously. : This is likely the core filename
: If you work with GIS (Geographic Information Systems), this might be a zipped .ecw raster image. If you have downloaded this file and want
: This is a standard compressed archive format . It means the "ecwys" data is bundled and shrunk to save space or make it easier to transfer. How to Open It
: Double-click the file; the Archive Utility will automatically unzip it.
: It is typically found in your "Downloads" folder. Extract the Contents : Windows : Right-click the file and select "Extract All..." .