# Extension Size Limit

**URL:** https://forum.makecode.com/t/extension-size-limit/1887
**Category:** Maker
**Created:** [April 30, 2020, 9:45am UTC](https://forum.makecode.com/t/extension-size-limit/1887 "2020-04-30T09:45:31Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![luqmaanb](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/luqmaanb/32/504_2.png) [@luqmaanb](https://forum.makecode.com/u/luqmaanb)
#### Post date: [April 30, 2020, 9:45am UTC](https://forum.makecode.com/t/extension-size-limit/1887/1 "2020-04-30T09:45:31Z")

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I’m using the CS11 (SAMD21) board by XinaBox with an onboard SD card holder. I can’t use the SD card because of the size limit on an extension. I’ve ported the [SDFileSystem](https://os.mbed.com/handbook/SDFileSystem) library to microbit ([pxt-IM01](https://github.com/luqmaanb/pxt-IM01)) and I’m only able to create folders due to lack of memory on the microbit. If the size limit on extensions can be increased I can use the SDFileSystem library in maker with CS11. Is it possible for the size limit to be increased to, say, 200Kb? What are the consequences of this?

Thanks