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What are these file extensions?

Permanently deleted user
I am just looking at deleting junk and duplicate files from my pictures HDD. I have found a lot of C1 files with the extension .cof, cop and C1w. What are they and should I keep them?
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Comments

4 comments

Date Votes
  • SFA
    ,cof and .cop files are found in Sessions Cache folders and are "proxies" - Previews and Thumbnails as I understand things.

    You can delete them but there may be little point in doing so unless you are archiving a session. They will be created again next time you open the session (or the parent folder that contains them is opened within a session.

    I do not have an files with extension .C1w in my system according to Windows search. (*.C1w)

    Searching with .C1W produces a relatively short list of ,jpg files, at least some of which are outputs from C1. But not all of them.

    Google search suggests these are C1 Work Files that same to be file name conventions used in early versions of C1 judging by the dates of questions and answers posted in threads.

    The jpgs my search finds that report ".C1w" in the contents of the file have a range of dates right up to yesterday but none are as old as the dates of the posted comments.

    Unless anyone here comments further (or you search Google and find a more complete explanation than I have read) I would suggest you contact the Support Team for further information about the possible affects of deletion.


    HTH.


    Grant
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  • Permanently deleted user
    Thank you Grant very much for that. I use sessions only on my travelling MS Surface Pro. They are imported into my PC and C1 main catalogue on return home so I think they are redundant. I don't have any current sessions.
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  • Benjamin Liddle
    [quote="SFA" wrote:
    ,cof and .cop files are found in Sessions Cache folders and are "proxies" - Previews and Thumbnails as I understand things.

    You can delete them but there may be little point in doing so unless you are archiving a session. They will be created again next time you open the session (or the parent folder that contains them is opened within a session.

    I do not have an files with extension .C1w in my system according to Windows search. (*.C1w)

    Searching with .C1W produces a relatively short list of ,jpg files, at least some of which are outputs from C1. But not all of them.

    Google search suggests these are C1 Work Files that same to be file name conventions used in early versions of C1 judging by the dates of questions and answers posted in threads.

    The jpgs my search finds that report ".C1w" in the contents of the file have a range of dates right up to yesterday but none are as old as the dates of the posted comments.

    Unless anyone here comments further (or you search Google and find a more complete explanation than I have read) I would suggest you contact the Support Team for further information about the possible affects of deletion.


    HTH.


    Grant


    You were 99% correct, .cof is the Focus Mask file.
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  • SFA
    [quote="ben_US" wrote:
    [quote="SFA" wrote:
    ,cof and .cop files are found in Sessions Cache folders and are "proxies" - Previews and Thumbnails as I understand things.

    You can delete them but there may be little point in doing so unless you are archiving a session. They will be created again next time you open the session (or the parent folder that contains them is opened within a session.

    I do not have an files with extension .C1w in my system according to Windows search. (*.C1w)

    Searching with .C1W produces a relatively short list of ,jpg files, at least some of which are outputs from C1. But not all of them.

    Google search suggests these are C1 Work Files that same to be file name conventions used in early versions of C1 judging by the dates of questions and answers posted in threads.

    The jpgs my search finds that report ".C1w" in the contents of the file have a range of dates right up to yesterday but none are as old as the dates of the posted comments.

    Unless anyone here comments further (or you search Google and find a more complete explanation than I have read) I would suggest you contact the Support Team for further information about the possible affects of deletion.


    HTH.


    Grant


    You were 99% correct, .cof is the Focus Mask file.


    AH!

    Thanks Ben. You know now that you mention it I knew that once but had completely forgotten on the basis that I didn't need to know and if I did suddenly have a new need to know I could simply open the file and work it out - which I probably should have done this morning!

    On the other hand the information would make no difference to the OP ion this case. Phew.


    Grant
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