Using external storage


The External Storage on an Android device is an area to which apps can read and write files. The Android client uses it to back up the database, and to store product images. Traditionally it was an SD card, but in most modern devices it is located in internal storage, on the flash ROM.

File Manager

Database backups are not shown in File Explorer, but they are visible in file manager apps. We recommend File Manager+, which can be installed using the link in the sidebar.

The gallery below shows how to locate the Vanguard folder, using File Manager+. The Vanguard folder, and the images folder inside it, are both created when the Sales app is launched (not when it is installed).

File Explorer

The gallery below shows how to access the internal storage on an Android device, connected over USB.

Product Images

  1. The product images must all be places in the /Vanguard/images folder.
  2. The file names must mach the names of the products.
  3. The extensions must all be “.jpg”.
  4. Each product image should be roughly square, and no larger than 100 KB.

After the product images have been copied to the device, the thumbnails should be created, using the Create Thumbnails option on the SD Card screen of the Android client.


Android 11 no longer supports external storage. Version 7.1.0 is due to replace it with Google Drive.

Author: Philip Sheard

Philip Sheard has been working in IT for over 40 years, and on this project for the last 20. His current skills include Java, Android, Objective-C, iOS, PHP, MySQL, ASP.Net, SQL Server, HTML, CSS, Apache and WordPress.