Diferences between file modification date/time AND Modify Date

[breos]

hi, all

I have this two fields in a report form exift tools and dont know the difference between them:

ExifTool Version Number         : 10.56

File Modification Date/Time     : 2016:06:14 11:51:36+02:00
File Access Date/Time           : 2017:06:09 18:49:28+02:00
File Creation Date/Time         : 2017:06:09 18:49:28+02:00

Create Date                     : 2016:06:03 11:35:21
Modify Date                     : 2016:06:03 11:35:23

Pershaps the File modification date/time is something related to file name and the modify date is related with the content of the file?

Thanks for your help

[StarGeek]

The three File timestamps are properties of the underlying filesystem, e.g. Windows, Mac, Linux.  All files have this data, not just image/video files.  You can view this on Windows, for example, by right clicking a file and selecting Details tab.  File Modification Date/Time will change any time the file is opened by the OS for a write operation, even if no data has been changed.

The Modify Date tag is a value internal to the file.  This value represents the the time that the image was was changed.  It is up to the software to set this time and many programs do not set this value, so it is not reliable.

[breos]

Thanks for your reply, Star.

Im thinking in use the data extracted from a file in an official procedure, but your reply will make me think twice before do it.