Instruction: Generate an answer to the question by utilizing the information contained in the document.

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Question: If I just want it to capture clips when motion is detected, will I need a DVR or some sort of storage device?
Document: The video is in 2D and it has to be de-encoded for motion trigger capture, resizing, etc. The only tips I recall being suggested (on this Blue Iris forum) to mitigate/lower CPU usage is to record DIRECT to disk and also to aggregate the recorded mini-clips into larger/longer recorded blocks of data.
I got the "non-foscam" version from the blueiris website and it is amazing. I have set up multiple cameras with motion detection to capture alert videos and snapshots and it works great.I was even able to hook up an external script to notify my home automation software when the camera detected motion. And there's so many parameters to accept reject motion that it allows you to tune out "false positives" and get great detection.
Does exactly what it claims. I can monitor all my cameras on the same screen from my home or when I am away. Record any camera or any combination or all at the same time. Can just set up capture on motion for those camera I don't want continous recording. I does have a lot of options, but has excellent help screen.
This software does have many features that I have not yet explored but let me just say that I've setup up my 5 cameras with this software and it already does what I want it to do without reading on the additional setup. By default, it will record jpeg and movie  clips with a time stamp when it detects motion and saves all clips to the &#34;clips&#34; folder to the right side of the software window.
This software is PERFECT if you own a business and want to record any robberies. You can also manually record with a start/stop button and chose the folder you want it saved to. You can run this software while you do other tasks on your computer and it will still save clips. I use windows 7 and have a 4gb ram, 2.3 ghz processor, this software does not slow down my laptop at all.
With the pc software, it's ok. The only thing I that bothers me is the fact that I can't rearrange the monitors the way I want to. There are preset configurations, but the order in which the cameras are displayed I can't control. Also, when looking at the recorded clips the order the clips are arranged are random. It's not camera 1, then 2 then 3, etc. The software works (expect my problems with the mobile version), but needs improvement.
The software is capable of running as a service, meaning I don't have to start it every time I want to use it, and is constantly watching my camera's for activity. I'm not recording 24x7 instead I start recording after 'x' seconds of activity detected by the system. This works great by allowing me to detect anyone actually on my driveway as opposed to cars driving by in the street.I read several reviews talking about the difficulty in setting up the system.
I have a multiple Foscam camera setup and have used Blue Iris on a spare PC to act as my DVR and notification manager. It records to a 1TB NAS on the network and handles all the alerts, scheduling, sensitivity/contrast programming and event monitoring. This was the best additional purchase I could have made to compliment my Foscam cameras. If you want more sophisticated control over your Foscam cameras and features that far exceed what the camera has to offer via its included firmware, stop hesitating: buy Blue Iris.
These cams are excatly what I was needing takes some effort to set up but if u ever set up a wirless router its the same thing. I gwt snapshots and 10 clips to my phone and email while im at work throughout the day when set them to motion senser. Even inside when my dog moves around. Telling me friends
I'll probably set up a DropBox account for her so clips from the back door camera go straight to it. Also, you can set Iris to do different things at different times, so I might try having the front door camera recording clips to DropBox when motion is sensed after hours. You can also set Iris to send emails to you when motion is sensed after hours, so you can know if your business has been broken into.Blue Iris isn't perfect.
Answer: You need a personal computer with sufficient storage to install Blue Iris and store the amount of video that you care to store.  You do not need any external storage device or additional equipment.  Your PC's hard disk drive will store the video clips, and you can specify the folder where you wish to have them stored.  I suggest installing a separate hard disk drive just for storing the video clips so that you are not putting so many disk write operations on your system disk, but it is not necessary to do so.