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I have a DS-2CD2021G1-IDW1 with same problem. :( Is there a update regarding this issue?

please help me with an answer . . .

Hmmmmmm I think you are right :( As I play around after this upgrade, I find some functions that doesn't work or work very slow. Can I do a downgrade to 4.20.001?

Done this update now. No problems so far. Thanks!

Done firmware upgrade to 4.20.001 build 190430 with no problem. Is there a newer firmware version for my DVR? Thanks!

I think is the same as it is K72A, instead of K72 which is the non B version. Is there a compare between K72 vs K72A features? Thanks again for your support!

Many thanks! Do you know what (B) stands for? Is a new hardware revision? Does it have some new features? I can't find any info for this (B) :(

K72 K72A DS-7104HQHI-K1 DS-7104HQHI-K1(B) As in the spreadsheet, is it K72 or K72A? I think that it is K72A witch has totally different firmware. What (B) version represents? Does it have some extra functions, like (S) versions have? I don't want to brick my DVR doing this firmware update...

Hello, I have a HIKVision DVR Model DS-7104HQHI-K1 and it has this (B) after Serial Number, which I don't know what it means. My curent Firmware is: And the (B) is missing. :( Please help me identify the corect and latest firmware for my DVR. Many thanks!