# Iot usb write problem

**URL:** <https://discourse.nodered.org/t/iot-usb-write-problem/82917>\
**Category:** General\
**Created:** [16 November 2023 11:09 UTC](https://discourse.nodered.org/t/iot-usb-write-problem/82917 "2023-11-16T11:09:44Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![MA.ING](https://avatars.discourse-cdn.com/v4/letter/m/d9b06d/32.png) [@MA.ING](https://discourse.nodered.org/u/MA.ING)\
**Post date:** [16 November 2023 11:09 UTC](https://discourse.nodered.org/t/iot-usb-write-problem/82917/1 "2023-11-16T11:09:44Z")

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Hi,

Im trying to write a csv in a usb at IOT2050, i mount the usb and try to send the csv with csv node and write file node but i get this error all time:

"failed to append to file: Error: EACCES: permission denied, open '/media/usb-drive/test.csv'

Someone knows what permission i need or how can i do to solve this?

Thanks in advanced.  
Regards.

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**Author:** ![issambfs1](https://avatars.discourse-cdn.com/v4/letter/i/ea666f/32.png) [@issambfs1](https://discourse.nodered.org/u/issambfs1)\
**Post date:** [16 November 2023 14:13 UTC](https://discourse.nodered.org/t/iot-usb-write-problem/82917/2 "2023-11-16T14:13:09Z")

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try to read a file from the usb first  
or run as root or run this commende  
chmod 666 /media/usb-drive/test.csv

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<div class="post-metadata">

**Author:** ![MA.ING](https://avatars.discourse-cdn.com/v4/letter/m/d9b06d/32.png) [@MA.ING](https://discourse.nodered.org/u/MA.ING)\
**Post date:** [17 November 2023 07:37 UTC](https://discourse.nodered.org/t/iot-usb-write-problem/82917/3 "2023-11-17T07:37:01Z")

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Hi issambfs1,

I try but the same, permission denied.

When i mount the usb (sudo mount /dev/sdb1 /media/usb-drive) i cannt access to /media/usb-drive, permiss denied, if i umount the usb i can acces to /media/usb-drive.

So when usb is mounted i cannt access /media/usb-drive but if is umounted i can access/read/write at /media/usb-drive without problems.

I dont know where is the problem, im a little newby at ubuntu.

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**Author:** ![Colin](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/colin/32/17040_2.png) [@Colin](https://discourse.nodered.org/u/Colin)\
**Post date:** [17 November 2023 13:18 UTC](https://discourse.nodered.org/t/iot-usb-write-problem/82917/4 "2023-11-17T13:18:01Z")

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Having mounted it, what does this command show?  
`sudo ls -al /media/usb-drive`

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<div class="post-metadata">

**Author:** ![MA.ING](https://avatars.discourse-cdn.com/v4/letter/m/d9b06d/32.png) [@MA.ING](https://discourse.nodered.org/u/MA.ING)\
**Post date:** [20 November 2023 08:08 UTC](https://discourse.nodered.org/t/iot-usb-write-problem/82917/5 "2023-11-20T08:08:22Z")

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Hi Colin,

I have it, solved with :

> sudo mount /dev/sda1 /media/usb-drive -o umask=000

Thank you!

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [4 December 2023 08:09 UTC](https://discourse.nodered.org/t/iot-usb-write-problem/82917/6 "2023-12-04T08:09:17Z")

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