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February 23, 2018
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I wonder if someone might help me with a query.
I have a Vistron "AHD.DVR-4V" CCTV system which is set to record and review over a 30 day period.
The unit contains a hard drive which I suspect is way bigger, in capacity, than is required to record just 30 days.
At the end of each 30 days, the unit starts counting the next thirty days - meaning that the Menu only allows me to review each past 30 day period.
I am wondering if means it automatically over-writes the earlier recordings or simply only make the past thirty days available through the menu, yet write to different area(s) of the hard drive, which would make it technically possible to recover the older recordings through interrogating the drive via either and/or a PC or Mac.
Has anyone any experience of retrieving old data, in this manner, who would be willing to advise please?
If it is possible, would I need any propriety software?
I have made enquiries of the manufacturer (based in Singapore) but suspect the unit may actually be a generic model being marketed under a variety of guises and the "manufacturer" seems disinclined to even acknowledge my email enquiries of them.
Thank you.
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January 3, 2014
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We can only support our products. What I can tell you is from our products the time you have with recording "Days" is solely based on the capacity of your hard disk drive and the encode settings of your camera. I would suggest contacting Vistron to get more details on what their camera do when it comes to Frames Per Second, Bit rate and Resolution. It is common among all CCTV recorder Manufacturers and Distributors to record over your old data so if your recorder as you stated has enough capacity for 30 days, the 30th day will be overridden by today's recorder by the minute. If you need more recording space, I suggest upgrading your hard drive to a larger capacity one. Our Drives start at 1tb to 10tb. Please contact a Sales Professional to obtain one at 866 573-8878 option 2
Answers Post
Jose Malave - IT Director| Toll Free: 866-573-8878 | E-mail: support@securitycameraking.com
February 23, 2018
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Jose Malave said
We can only support our products. What I can tell you is from our products the time you have with recording "Days" is solely based on the capacity of your hard disk drive and the encode settings of your camera. I would suggest contacting Vistron to get more details on what their camera do when it comes to Frames Per Second, Bit rate and Resolution. It is common among all CCTV recorder Manufacturers and Distributors to record over your old data so if your recorder as you stated has enough capacity for 30 days, the 30th day will be overridden by today's recorder by the minute. If you need more recording space, I suggest upgrading your hard drive to a larger capacity one. Our Drives start at 1tb to 10tb. Please contact a Sales Professional to obtain one at 866 573-8878 option 2
Thank you for such a swift and helpful response.
I'll be in touch with Camera King again, before I buy my next system.
As the owner of an IT Support firm, I have been considering offering CCTV systems and servicing to my clients and seeing this helpful forum is tempting me to take the plunge.
Your time and your caring to respond is very much appreciated.
January 3, 2014
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It is my pleasure to be of assistance. If you are in the business please take a look at our Dealer Program Here.
Be well and have a Great Weekend! 
Jose Malave - IT Director| Toll Free: 866-573-8878 | E-mail: support@securitycameraking.com
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