To resolve, you will need to update your DT4000G2DM encrypted USB drive for macOS Catalina. To update, click on the link below to
download the DT4000G2DM_Mac_Updater.app and DT4000G2DM Mac Updater Instructions. 

Note: Please read the updater instructions in its entirety prior to running the update.

Updater: https://media.kingston.com/support/downloads/DT4000G2DM_Mac_Updater.zip

For more information about the "App” not optimized or “App” needs update error message,
feel free to reference Apple’s support article. https://support.apple.com/en-us/HT208436

macOS: DT4000G2DM_Mac_Updater.app supported on macOS 10.15 Catalina.