All metadata associated with an asset is downloaded each time multiple assets are downloaded. This includes any custom fields. Multiple files are always downloaded as a zip file, and that zip file includes an images.csv file, which contains all data for each asset.
Three steps are required.
1) Select multiple files and press Download:
2) Open the zip file to find images.csv:
3) Open the CSV file in any spreadsheet or text editor:
The above three steps:
For common image file types, such as jpg, png, tiff, and Adobe Files (pdf, psd, ai, eps), metadata is also stored in the XMP/IPTC metadata area of the files themselves.
Special usage note: If it is required that data for asset files is modified outside DBGallery, this CSV file may be modified manually or by 3rd party systems then re-imported into DBGallery. See the Data Import Guide for import instructions.