Hi, I’m having a similar issue. I have about ~275GB of data synced from Dropbox to B2 (~200,000 files in ~35,000 directories). I’d like to have a daily cron run to keep it up to date. However, each time I run rclone (without --old-sync-method) it uses 10,000+ transactions. Although the cost is negligible for a day, over a year this would nearly double the cost of me using B2.
Keeping some kind of low-transaction method, without too higher price to pay in terms of speed and memory usage, would be ideal for this kind of use-case. I understand this might be asking too much though! 