Please find the description of those two terms below:
Packets per Xfer: A transfer is a collection of packets for one data set. More number of packets per each transfer reduces the USB overhead and helps in achieving higher data rate.
Xfers to Queue: This setting helps in initiating multiple transfers and adding them to task queue. This reduces the latency between successive transfers on the host application side. So queuing more transfers give higher data rate.
Thank you for the quick response!
I would like to know how big is one packet of data
and if the packets are stored by this application.
If you are using Streamer for USB 2.0 BULK transfers then packet is 512Bytes.
It is 1024Bytes in case of USB 3.0 BULK.