SLOWNESS - BackBlaze B2 and Windows PCs

hello and welcome to the forum,

if you have move the files to cloud, then that is going to be slower than having the files local.
did you expect something different?
can you post the output of a speedtest, including ping


rclone has to calculate checksums
rclone will calculate the SHA1 checksum of the input before uploading


local to b2 or b2 to local or what?
B2 does not support server-side move, so rclone has to do copy and delete


rclone has two caches, might want to pre-cache the vfs dir cache.
https://forum.rclone.org/t/status-about-using-rclone-for-music-storage-playback-in-2021-access-times-improved/27648/34
to the mount command, add --rc --rc-no-auth
and once the mount is running, run rclone rc vfs/refresh recursive=true

could experiment with
--buffer-size=0 --network-mode


in all my testing, nothing is faster than wasabi, also, does not charge for api calls.

B2 support the S3 api, might test with that