I use EaseUS Todo Backup Free 13.0 to set my Google Drive and external drive backups.
I have not had any problems with the backups to my external drive using EaseUS Todo Backup. But the daily incremental backups to my Google Drive account stopped three months ago, and the full backups are not complete each month. My Google Drive full backup on January 3rd-5th was seven 5Gb files, but my full backup February 7th was two 5Gb files.
In Todo Backup on the Backup Scheme window I have Backup method set to Incremental, Schedule Type set to Daily, Time set at 6:00 AM, and the "Wake the computer to run this backup" and "Run missed backup at system startup if computer is shutdown" boxes checked.
I use WiFi to connect to the internet, so maybe the WiFi connection is inconsistent or too weak to complete the daily incremental backups. I use a Google H2E extender. My internet connection is consistent. Occasionally my internet connection cuts off. But my monthly backups to Google Drive always complete for the files Todo Backup attempts to copy, and the incremental backups to Google Drive completed consistently until a couple months ago. When I try to force an incremental backup to Google Drive by clicking the "Backup" button, the backup procedure runs for a a very long time and eventually fails each time. Thanks for any replies.