piCorePlayer5.0 samba speed issue

I use piCorePlayer5.0 with samba installed, but the speed by transferring files from Windows 10 to USB HDD connected to Rpi 3b+ is very low (2mb/s). The network is OK.

I found that by adding this lines into smb.conf file can improve speed:

[global]
max xmit = 64000
socket options = IPTOS_LOWDELAY TCP_NODELAY SO_SNDBUF=64000 SO_RCVBUF=64000 SO_KEEPALIVE

How can i add this lines in piCorePlayer. Is it possible? I'm beginner.
Thank you!