Hello Jan,
Sorry for the late reply!
Analysing your log and reading your replies to Dale I believe I understand where the problem lies. PHP or your web server experiences a timeout issue when uploading the nearly 100Mb part file to remote storage. You missed
an important bit of the documentation. This is where I explain why the part size plays an important role in prevention of timeouts.
TL;DR: Set the part size for split archives to a smaller value. Keep reducing it until the backup completes. The exact part size depends on your server and its connection speed to the remote storage server, usually values between 10 and 20Mb work best.
Nicholas K. Dionysopoulos
Lead Developer and Director
🇬🇷Greek: native 🇬🇧English: excellent 🇫🇷French: basic • 🕐 My time zone is Europe / Athens
Please keep in mind my timezone and cultural differences when reading my replies. Thank you!