# Global Variable Values to a file or E-mail
**URL:** https://discourse.nodered.org/t/global-variable-values-to-a-file-or-e-mail/97326
**Category:** General
**Created:** [29 May 2025 17:59 UTC](https://discourse.nodered.org/t/global-variable-values-to-a-file-or-e-mail/97326 "2025-05-29T17:59:22Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@acestu](https://discourse.nodered.org/u/acestu)
#### Post date: [29 May 2025 17:59 UTC](https://discourse.nodered.org/t/global-variable-values-to-a-file-or-e-mail/97326/1 "2025-05-29T17:59:22Z")
Hi,
I have now worked out how to get my sensor data stored in global variables with the change node, so how do I get all the values into a file or an email ?
Thanks
Stuart
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### Author:  [@Bobo](https://discourse.nodered.org/u/Bobo)
#### Post date: [30 May 2025 06:13 UTC](https://discourse.nodered.org/t/global-variable-values-to-a-file-or-e-mail/97326/2 "2025-05-30T06:13:16Z")
By using the "write file" and "email" nodes. Read the help for each to get you started.
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### Author:  [@acestu](https://discourse.nodered.org/u/acestu)
#### Post date: [30 May 2025 14:39 UTC](https://discourse.nodered.org/t/global-variable-values-to-a-file-or-e-mail/97326/3 "2025-05-30T14:39:57Z")
Unfortunately the help files "write File" and "email" don't really help me as there is no mention of using system variables within your text.
Thanks
Stuart
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### Author:  [@jbudd](https://discourse.nodered.org/u/jbudd)
#### Post date: [30 May 2025 14:59 UTC](https://discourse.nodered.org/t/global-variable-values-to-a-file-or-e-mail/97326/4 "2025-05-30T14:59:33Z")
Do you know how to get data from your variable into a message? As msg.payload for example?
What happens when you send msg.payload into a Write-file node?
Is it the same for the email node, or does the node help tell you how to get a message property into the email body?
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### Author:  [@Colin](https://discourse.nodered.org/u/Colin)
#### Post date: [30 May 2025 15:11 UTC](https://discourse.nodered.org/t/global-variable-values-to-a-file-or-e-mail/97326/5 "2025-05-30T15:11:42Z")
I recommend watching this playlist: [Node-RED Essentials](https://www.youtube.com/playlist?list=PLyNBB9VCLmo1hyO-4fIZ08gqFcXBkHy-6). The videos are done by the developers of node-red. They're nice & short and to the point. You will understand a whole lot more in about 1 hour. A small investment for a lot of gain.
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### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [28 August 2025 15:12 UTC](https://discourse.nodered.org/t/global-variable-values-to-a-file-or-e-mail/97326/6 "2025-08-28T15:12:33Z")
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