The index needs to be rebuilt from scratch without the excessibe file count, that also means you can't restart and 'inherit' a previous backup. There is no way to alter this behavior once it's begun, aside from starting over with some files excluded. In doing so it was purging massive ammounts of memory causing behavior like Chrome (usign 10GB of memory on it's own) to hang/beachball for 30 seconds and then refresh all it's windows. This means that anytime bztransmit runs, it will load this 6GB file into RAM while it is backing up. On most systems, this files is under 100MB in size (paraphrased from Backblaze support rep Zack). This file is a list of all files Backblaze has previously uploaded, including a unique identifier for each file. Confirming these certificates means it’s connected to the web, double checking that everything is on the level.Backblaze's bztransmit process loads a file called bzfileids.dat into RAM. It’s trustd that’s examining and managing these certificates behind the scenes, which is why anyone setting up a third party firewall will see near constant notifications about trustd. On macOS, these certificates are also used by Mail and Messages to confirm identities. You can examine the certificates themselves by clicking the lock icon next to a URL:

These certificates are also used to encrypt your web traffic with HTTPS.

When using Safari, for example, these certificates confirm that the URL you’re looking at is actually from the domain you request. So what is a certificate? It’s a digital signature that browsers user to verify website identities and protect against imposters. RELATED: What Is HTTPS, and Why Should I Care? Trustd provides services for evaluating trust in certificates for all processes on the system. To be specific, trustd manages and checks certificates.

It is a daemon, which means it’s a process that runs in the background performing critical system tasks. Today’s process, trustd, is a part of macOS itself, and has been since 10.12 Sierra.

Bztransmit process mac