"cannot delete the bucket because it's being used by another process"

Two ways:

  1. One by one
uplink rm --pending "sj://temp/sw/VIDEO UTILITY/Panasonic HD writer AE 5.0/OSS LICENSE (AE)/HC-V520M,V520,V510/iptables/COPYING"
  1. The whole bucket
uplink rb --force sj://temp

(perhaps it would work on this time)

If you would be forced to use “one by one” method, then you can use this one-liner:

just add --pending to uplink ls and to uplink rm, and use your own bucket and prefix (“folder”) name.