When a file is being uploaded to a media library, users can upload the file itself and its thumbnail. The thumbnail will be displayed in the file list in the Media gallery web part. Thumbnails are typically used if you want to upload some non-image file and attach an image which will be displayed as the file's thumbnail in the file list. For image files, the thumbnail can, but doesn't have to be done as the image itself will be used for this purpose.

 

When the thumbnail image or the image itself is larger than the required thumbnail image size, its resized copy will be created with the required size. Both thumbnails and resized copies are stored in a hidden folder in the root of the media library folder. Name of the hidden folder can be set in Site Manager -> Settings -> Media libraries -> Media library hidden folder.

 

Format of media library files on the disk

 

 

 

Example

 

If you upload the following files:

 

 

with the following settings defined in Site Manager -> Settings -> Media libraries:

 

 

the uploaded files will be stored in the following locations in the media library folder, with the following names:

 

 

 

Page url: http://devnet.kentico.com/docs/devguide/index.html?names_of_files_and_thumbnails.htm