Backup (upload) the project in the display unit to external storage. The backup data (*.cml) can be converted into a project file and edited on a PC. You can also download and display the backup data on a different display unit.
You need to format (initialize) the external storage device in FAT. Format using your computer.
Please refer to the Settings Guide for details.
34.12.2 Memory Loader
Transferring Project Files from Display Unit to Computer (or to Another Display Unit)
The following shows the process for using a CF Card.
On the GP-Pro EX status bar, click the Transfer Project icon 
and launch the [Transfer Tool].
In [Select project], select the project you wish to transfer.
Click [Memory Loader] to open the following dialog box. Click [Create Boot Data].
Select [CF/SD] and click [Browse].
When the CF Card output folder is set as the temporary storage for a project, the output folder path is displayed in the [Select Folder] dialog box.
3.6.2 Procedure - Setting the Destination Folder
In the [Browse For Folders] dialog box, specify the CF Card's root folder (directory) and click [OK].
In the [Select Folder] dialog box, click [OK] to start creating data.
While creating data, the following dialog box appears to show the creation status.
After data creation is complete, click [Close]. The created data is saved in the CF Card..
When [CF Card Folder] is being used as a temporary place to store the project, data is output to the defined path. Copy all data in the [CF Card Folder] to the CF card's root folder.
Insert the CF card to the display unit. To display the system menu, within 0.5 seconds, touch the top-right then the bottom-left corner (or the top-left then bottom-right corner) of the display unit screen.
Touch [CF/USB]. Touch [CF startup] to automatically reset the display unit.
The Memory Loader Tool launches and the following screen opens. Touch [Upload].
Touch [Start] to save the project as backup data (*.cml). (If there is a password for transferring, input the password first, then touch [Start].)
Backup data is saved as displayed in the [File Name] field. If you are using AGP-3500T, by default this is "MEM3X00.CML." If you want to use another file name, touch [New File]. To overwrite an existing file name in the CF Card, touch [Select File].
When using GP-4100 Series (Monochrome Model), the password input keypad is separated into alphabetic input and numeric input keypads. Use the [A->1] and [1->A] keys to change keypads.
The input character changes every time you touch a key on the alphabetic keypad.
Once upload is complete, touch [Back] then [Exit] to close the Memory Loader Tool.
Remove the CF Card from the display unit and insert it into the PC.
On the GP-Pro EX status bar, click the Transfer Project icon and launch the [Transfer Tool].
Click [Memory Loader]. The following dialog box appears.
Click [Create Project].
In the following dialog box, select the CF Card in the [Look In] field. Select the backup file (*.cml) to convert to a project file and click [Open].
Enter the name and the location of the project file you are going to create and click [Save].
Confirm the information in the [Project Create] dialog box, and then click [Create].
Click [Browse] to edit the settings of the backup file or the project file.
The following dialog box appears.
"Creating project files complete." When the message box displays, click [Close].