Hi! The problem persists with another S3-compatible provider (Storj). And I believe the media streaming application isn't the one to be blamed, as the high egress rates continues even when the media application is shut down (only a rclone mounted the storj bucket running on the server). The shot shows the egress rates for the last two days (when the media application was down).
And the last 10000000 lines of rclone.log: rclone.log.zip
Rclone does nothing on its own and only applications request things from the mount.
You read this file:
2023/02/03 01:50:46 DEBUG : &{nwobhm/Crucifixion/Take It or Leave It (1982)/01 Take it or leave it.mp3 (r)}: >Flush: err=<nil>
2023/02/03 01:50:46 DEBUG : nwobhm/Crucifixion/Take It or Leave It (1982)/01 Take it or leave it.mp3: Attr:
2023/02/03 01:50:46 DEBUG : nwobhm/Crucifixion/Take It or Leave It (1982)/01 Take it or leave it.mp3: >Attr: a=valid=1s ino=0 size=8589422 mode=-rw-r--r--, err=<nil>
2023/02/03 01:50:46 DEBUG : nwobhm/Crucifixion/Take It or Leave It (1982)/01 Take it or leave it.mp3: Attr:
2023/02/03 01:50:46 DEBUG : nwobhm/Crucifixion/Take It or Leave It (1982)/01 Take it or leave it.mp3: >Attr: a=valid=1s ino=0 size=8589422 mode=-rw-r--r--, err=<nil>
2023/02/03 01:50:46 DEBUG : &{nwobhm/Crucifixion/Take It or Leave It (1982)/01 Take it or leave it.mp3 (r)}: Release:
2023/02/03 01:50:46 DEBUG : nwobhm/Crucifixion/Take It or Leave It (1982)/01 Take it or leave it.mp3: ReadFileHandle.Release closing
2023/02/03 01:50:46 DEBUG : &{nwobhm/Crucifixion/Take It or Leave It (1982)/01 Take it or leave it.mp3 (r)}: Read: len=65536, offset=0
2023/02/03 01:50:46 DEBUG : nwobhm/Crucifixion/Take It or Leave It (1982)/01 Take it or leave it.mp3: ChunkedReader.openRange at 0 length 134217728
2023/02/03 01:50:46 DEBUG : &{nwobhm/Crucifixion/Take It or Leave It (1982)/01 Take it or leave it.mp3 (r)}: Flush:
2023/02/03 01:50:46 DEBUG : &{nwobhm/Crucifixion/Take It or Leave It (1982)/01 Take it or leave it.mp3 (r)}: >Flush: err=<nil>
2023/02/03 01:50:46 DEBUG : &{nwobhm/Crucifixion/Take It or Leave It (1982)/01 Take it or leave it.mp3 (r)}: Release:
and this file
2023/02/03 01:56:48 DEBUG : nwobhm/Crucifixion/Take It or Leave It (1982)/02 On the Run.mp3: ChunkedReader.Read at 28672 length 32768 chunkOffset 0 chunkSize 134217728
2023/02/03 01:56:48 DEBUG : nwobhm/Crucifixion/Take It or Leave It (1982)/02 On the Run.mp3: ChunkedReader.Read at 61440 length 65536 chunkOffset 0 chunkSize 134217728
2023/02/03 01:56:48 DEBUG : nwobhm/Crucifixion/Take It or Leave It (1982)/02 On the Run.mp3: ChunkedReader.Read at 126976 length 131072 chunkOffset 0 chunkSize 134217728
2023/02/03 02:07:17 DEBUG : metal & related/Thrash/BloodLust [Usa]/(1988) Terminal Velocity [Ep]/02 - City of the Forgotten.mp3: >Attr: a=valid=1s ino=0 size=11313134 mode=-rw-r--r--, err=<nil>
2023/02/03 02:07:17 DEBUG : &{metal & related/Thrash/BloodLust [Usa]/(1988) Terminal Velocity [Ep]/02 - City of the Forgotten.mp3 (r)}: Read: len=65536, offset=0
2023/02/03 02:07:17 DEBUG : metal & related/Thrash/BloodLust [Usa]/(1988) Terminal Velocity [Ep]/02 - City of the Forgotten.mp3: ChunkedReader.openRange at 0 length 134217728
2023/02/03 02:07:17 DEBUG : metal & related/Thrash/BloodLust [Usa]/(1988) Terminal Velocity [Ep]/02 - City of the Forgotten.mp3: ChunkedReader.Read at 258048 length 262144 chunkOffset 0 chunkSize 134217728
2023/02/03 02:07:17 DEBUG : metal & related/Thrash/BloodLust [Usa]/(1988) Terminal Velocity [Ep]/02 - City of the Forgotten.mp3: ChunkedReader.Read at 520192 length 524288 chunkOffset 0 chunkSize 134217728
2023/02/03 02:07:17 DEBUG : metal & related/Thrash/BloodLust [Usa]/(1988) Terminal Velocity [Ep]/02 - City of the Forgotten.mp3: ChunkedReader.Read at 1044480 length 1048576 chunkOffset 0 chunkSize 134217728
2023/02/03 02:07:18 DEBUG : metal & related/Thrash/BloodLust [Usa]/(1988) Terminal Velocity [Ep]/02 - City of the Forgotten.mp3: ChunkedReader.Read at 2093056 length 1048576 chunkOffset 0 chunkSize 134217728
2023/02/03 02:07:18 DEBUG : &{metal & related/Thrash/BloodLust [Usa]/(1988) Terminal Velocity [Ep]/02 - City of the Forgotten.mp3 (r)}: >Release: err=<nil>
So your assumption of only a rclone mount running with nothing access isn't right as the logs indicate otherwise. You'd have to figure out what else is using your mount as rclone by itself really does nothing.