Hi yes this is still your problem
it will write to the hard drive and playback is fine …… but remotely you are asking to read data from drive
but you still have to problem of wrong drive the speed is too slow ….. that drive is the wrong one
if your installers also left it on h264 then it all adds up your installer has no clue about cctv
we stopped using h264 2 years ago
h265 will also make your system run quicker local and away h265 are smaller files
we’re are you located