I am getting no more than 300KB/s (occasionally dipping below 100KB/s) transferring files from Pi Zero W wirelessly to Windows 7 machine on same network using WinSPC.
I have done the following so far:
check download and upload speed for Pi Zero W (using internet speed test online). This gave 3MB/s down and 2MB/s up. -> this cannot be the problem
during file transfer I monitored the CPU usage of Pi -> never goes above 40%, so this cannot be the bottleneck either.
used a Linux machine in Virtual Box to transfer files directly using SPC command -> same speed, so maybe issue isn't even with WinSPC
chose different protocol, i.e. SFTP (same speed) and FTP (did not work) -> so it's not the FT protocol
reset my router, which resulted in no improvement -> maybe not a router problem
So, are these abysmal transfer rates of 300KB/s expected or should I do better? What else could I try?