Thank you, Mr. Wheeler.
"Some of your questions would likely be easily answered if you provided a link to the exact TIFF file and the raw file in question through a file sharing service such as dropbox etc."
We cannot do this. My friend's PC is shared with her husband & located in a place where prohibits such behaviors.
We have found something else:
Layman's assumption.
The ACR editing-data is attached to the RAW file once it is edited by ACR.
Something happened on March 5 2021 while editing a RAW file in ACR.
Everything became extremely large & the PC was dead.
Before this incident, RAW files (a)which had been edited by ACR (b)which had changed their locations (c)were opened again at new location, they appeared in ACR as new RAW files.
After this incident, RAW files (a)which had been edited by ACR (b))which had changed their locations (c)were opened again at new location, they appeared in ACR as RAW files now being edited by ACR.
Because of this, we assume,maybe this is what that makes the TIFF files large, 140~195MB each, (the editing data were attached to the RAW files and the TIFF file) and makes Windows Photo Viewer
cannot show the TIFF images as edited by ACR. Thus, Windows Photo Viewer can only show the images as if they were saved by ACR without editing data (because Windows Photo Viewer can not read the ACR editing date ).
Does this make any sense? Would like to see your instructions, please.
Much appreciate.
Vicky
