ERROR: Maximum execution time of 60 seconds exceeded

I am getting errors only when backing up files, no issues with XML or db, not sure what has changed to possibly cause this?

November 27, 2016 at 4:00 am weekly-Files 2 ERRORS
November 27, 2016 at 3:01 am weekly-XML + Plugin List OK
November 27, 2016 at 2:00 am weekly-db OK

Appreciate any guidance on a solution?

[INFO] BackWPup 3.3.4; A project of Inpsyde GmbH
[INFO] WordPress 4.6.1 on https://bx86.org/
[INFO] Log Level: Normal 
[INFO] BackWPup job: weekly-Files
[INFO] Logfile is: backwpup_log_511901_2016-11-27_04-00-05.html
[INFO] Backup file is: backwpup_511901_2016-11-27_04-00-05.tar.bz2
[27-Nov-2016 04:00:05] 1. Trying to make a list of folders to back up …
[27-Nov-2016 04:00:08] Added "wp-config.php" to backup file list
[27-Nov-2016 04:00:08] 506 folders to backup.
[27-Nov-2016 04:00:08] 1. Trying to generate a manifest file …
[27-Nov-2016 04:00:08] Added manifest.json file with 6.93 KB to backup file list.
[27-Nov-2016 04:00:08] 1. Trying to create backup archive …
[27-Nov-2016 04:00:08] Compressing files as TarBz2. Please be patient, this may take a moment.
[27-Nov-2016 04:01:16] ERROR: Maximum execution time of 60 seconds exceeded
[27-Nov-2016 04:01:17] 2. Trying to create backup archive …
[27-Nov-2016 04:02:11] Backup archive created.
[27-Nov-2016 04:02:11] Archive size is 377.48 MB.
[27-Nov-2016 04:02:11] 4576 Files with 408.75 MB in Archive.
[27-Nov-2016 04:02:11] 1. Try to send backup file to Dropbox …
[27-Nov-2016 04:02:12] Authenticated with Dropbox of user: Bill XXXXer
[27-Nov-2016 04:02:12] Uploading to Dropbox …
[27-Nov-2016 04:06:32] Backup transferred to https://content.dropboxapi.com/1/files/sandbox/bx86/backwpup_511901_2016-11-27_04-00-05.tar.bz2
[27-Nov-2016 04:06:35] 2 files deleted on Dropbox
[27-Nov-2016 04:06:35] One old log deleted
[27-Nov-2016 04:06:35] ERROR: Job has ended with errors in 390 seconds. You must resolve the errors for correct execution.