Android - Missing files in Gallery

Why are files missing from my Gallery?


There are a few main instances where data can become disconnected from the Sketchbook Gallery on Android devices.



Important Tips for Android Photo Gallery Users

Be aware that Sketchbook files will appear in Android Photo Galleries. Many Photo Galleries and Image Viewing apps will search all visible folders on the Android device.  Sketchbook thumbnail previews and layered TIFF files will appear in those apps and can look like duplicates or unwanted files.  

Moving or renaming these files will break the connection with the Sketchbook Gallery, and they will appear to be missing.

Failed to open Image

This message is displayed when the Sketchbook TIFF (the full layered file) is not found.  

Possible causes for a missing TIFF are

  1. it has been removed, or 
  2. it has been renamed

One common cause on Android devices is unintentional changes to Sketchbook files from inside the Android Photo Gallery.  Sketchbook actually creates two versions of your art - the layered TIFF file that is your work, and a flattened PNG preview image. 


Most photo gallery apps search for images across device folders and will add Sketchbook’s PNG preview images and TIFF files to their library. 


TIFF files are often displayed with a generic image icon:1626073071359-1626073071359.png


Some people have unknowingly moved, deleted or renamed their Sketchbook files from inside their Android Photo Gallery. 


If a file was moved

If a TIFF file is moved into another folder on the device, the Sketchbook Gallery will not be able to locate it and it will appear to be missing

  • Troubleshooting:
    • You can move TIFF files back to the /Autodesk/SketchBook3 folder to restore the connection to the Sketchbook Gallery.


If a file was deleted

If the file is deleted from the Android Photo Gallery or from the File Manager, the Sketchbook Gallery will not be able to locate it.

  • Troubleshooting
    • You must recover the photo from the Photo Gallery Trash
    • Note: deleted files on Android are often automatically removed from Trash after 30 days and would become unrecoverable



If a file was renamed

If you renamed a Sketchbook TIFF file in your Android Photo Gallery, that will break it’s connection to the Sketchbook Gallery and the file will appear to be missing from Sketchbook. 

  • Troubleshooting:
    • In the Android Photo Gallery details of the file you want to restore, check to see if the renamed TIFF remains in the /Autodesk/SketchBook3 folder. If it does, go to Sketchbook > Preferences and use the Gallery Image Recovery tool. This will identify any unconnected TIFF files in the folder and restore them to the Sketchbook Gallery in a new folder called “Recovered”.
    • Alternatively, you can restore the original name of the TIFF, and therefore the connection to the Sketchbook Gallery. The original name with be the same as the PNG image with only the differing file extension at the end. This will restore the connection to the Sketchbook Gallery.


Missing previews in Sketchbook Gallery

If a Sketchbook preview image (PNG) is moved, renamed, or deleted from inside the Android File Manager or Photo Gallery, the preview cannot appear in your Sketchbook Gallery so it can look like your work is missing or the Gallery is malfunctioning.  

There may be a spinner that continuously searches for the missing file or nothing will appear in that location. You should still be able to tap on the location and open the file.

The next save of that image will generate a new preview image for the Sketchbook Gallery.