You have added the information block to the device type, refer to Adding information blocks.
Proceed as follows
Click the Upload button to add an attachment.
→ The Upload dialog is displayed.
Click the Upload icon to select an attachment.
Click the Confirm button to upload the attachment to the device.
→ The attachment has been added to the device.
If necessary, repeat the steps to upload another attachment.
To remove an attachment, click the icon to open the drop-down menu. Select either the option Remove from Device or Remove from Device and Attachments. The Remove from Device option removes the link but keeps the attachment whereas the Remove from Device and Attachments deletes the attachment as a whole.
In the Examples chapter, you can find information on how to add an attachment to a device, refer to All Devices: Attaching PDF files to a device.