Samba Transfer Speed on Raspberry Pi 4

Hello,

is there a way to get higher transfer speeds for samba on my rpi4? Currently i am getting around 70mb/s, but with ftp i reach up to 110-120mb/s.
I did the hdparm test and the results were okay, same with iperf.

Setup:
Raspberry Pi 4 - 4GB RAM
Powered USB 3.0 Hub
1x WD Elements 6TB via USB 3.0 - Filesystem ext4
1x regular 2TB HDD via USB 3.0 - Filesystem ext4

Here are my settings:
min receivefile size = 16384
write cache size = 524288
getwd cache = yes
socket options = TCP_NODELAY IPTOS_LOWDELAY SO_RCVBUF=65536 SO_SNDBUF=65536
read raw = yes
write raw = yes
max xmit = 65535
dead time = 15

Does anybody get higher transfer rates or is 70mb/s the max with samba?

Thanks in advance.

Update:

Found my error!
My problem was the way my operation system (Linux Mint) mounted the network shares.
I had a little app installed called gigolo, which auto-mounted my network shares via gfvs-mount.
After deleting the app and manually mounting the shares via /etc/fstab, the transfer speed is alright (over or around 100 mb/s in read and write).

Really glad this worked out in the end...