Tyler, I can't thank you enough for the help you gave here. I've been mostly managing WP backups manually as I can only use Snapshot if I leave out uploads, which I do also want to back up. I'm curious if you had any suggestions from the developer regarding other effective methods.

The re-attempted backup after cleanup also yielded "empty response" :( I'm starting to think maybe we just can't use snapshot for this. Which I understand. If so, any recommended alternatives?

Thanks Tyler. I have initiated a managed backup and it eventually returned the "aw shucks" error with "<empty response>" so when you're able to, please look at the debug.log. The "files.zip" archive was there as a result of manually backing up the files. I guess it had been left there after creating & downloading. Sorry about that. I'll remove it entirely as well as a few other archives I spotted, and retry another managed backup. Also, it's possible that this particular site is larger as there's essentially two copies of it (live, dev/staging) via Multisite. I understand the size concerns. If the server storage isn't an issue and the individual files are not massive, it shouldn't matter how many files (i.e. uploaded jpg, pdf files) are backed up? Or does the archive created become a problem? We do have scheduled backups on the server, but looking for a manual solution to easily create backups prior to applying theme, plugin, and WP core updates. Maybe snapshot is not ideal for this, but that wasn't obvious when we set out to use it this way.

Tyler, thanks. I have emailed directly and await your response.

Hi Tyler, I have sent the requested info & granted support access as well. I'm sure you've seen it & may already be working on it but figured I would update here for posterity.

Tyler, it still failed after reducing the chunk size and adding the table chunk size limit too. I've renewed support access if you are able to look again and troubleshoot. If there's anything else we can do to identify a solution to this let me know. Additionally, I would love to have a fix for sites that don't use the managed backup method. I just need a reliable and painless backup solution.

Tyler, this change to wp-config.php seemed to do the trick, even for local backups. I've tested it on a couple sites and had success. Thank you for continuing to investigate. I've found another problematic site, though. It may be due to multi-site setup, I'm not sure. The backup looks like it's working just fine and then gets stuck again at the files portion. It also failed with the same error on the managed backup option. This is with the chunk size setting in wp_config.php. I will share admin access via the site if you can take a look. Thank you!

Thank you Tyler. I have submitted the requested info via the contact form. I look forward to hearing from you.

Thank you Tyler, I have granted support access to one of the sites we manage. I had not tried Managed Backups, I see that's a new option in beta. I tried it on another site (not the one granted access) and it gave an error: Request Timeout This request takes too long to process, it is timed out by the server. If it should not be timed out, please contact administrator of this web site to increase 'Connection Timeout'. Let me know what you find. Thanks!