Need advice on DVR Upgrade

[Erelaszun 0]

So last year, I purchased this system from amazon:

 

ZOSI 8CH 1080P DVR with 8pcs 1080P Security Cameras NO Hard Drive

 

While the quality of video is fine, what really hurts, and I can't ignore anymore, is the Laughable DVR.

 

The system is extremely laggy, while I am typing this, I've been trying to "backup" 10 30min files to my thumb drive (been going for 10min now),

and the bitrate options are very low.

 

I need to find a DVR (I have my own Hard Drive), that can support my camera's,

but also gives me better Bitrate Options (I want to encode in a higher bitrate, I want more quality over length),

Faster, smoother Interface, and can backup/playback files without unreasonable lag (I cant skip head or go back while playback is running, without a 2min lag)

 

I would also like to find a DVR that has FTP Backup capabilities, I mean this is on my network, and can stream to my phone, but has no FTP backup option... which just confuses me.

 

It doesn't need Wifi, as it will be connected via Ethernet.

 

Also, if one even exists, a DVR that I can view on my Fire TV Stick as well... that would be a HUGE Bonus.

 

Look forward to any advice... I am a CCTV Newb, and really need to upgrade this DVR to something that doesn't cause me headaches everytime I need to use it.

[Erelaszun 0]

anyone?