## Get 16-character b2sum fingerprint (for different files that share basename)
        fingerprint="$(b2sum -l32 "$fpath" | awk '{print $1}' )";
 
         ## Form output filename
         num="$(printf "$num_fmt" "$n")";
 
         ## Get 16-character b2sum fingerprint (for different files that share basename)
        fingerprint="$(b2sum -l32 "$fpath" | awk '{print $1}' )";
 
         ## Form output filename
         num="$(printf "$num_fmt" "$n")";