Problem using C4D Asset Browser with Octane is that Octane plugin make copy of all images loaded from it on disk C AppData\Roaming\Maxon\Maxon Cinema 4D 2023_732AD996\tex\assetdb folder. This is huge wasting of disk space especially using HDRI images.
If Octane can't use images directly from Asset Browser please add option to choose custom path for Assets storage. Using disc C for that is very bad idea because many people use this disc only for crucial system files for backup and security. Mostly times disc C has small amount of storage space for backup purpose to avoid system fault, viruses etc to make it easy to restore. Also clear image cache doesn't work for Assets storage path.