This message was posted on behalf of Intel Corporation
I am writing to follow up on your inquiry. As stated by N. Scott Pearson, It would be great to have additional information about the product you are using.
Please let us know if you need any further help.
Unfortunately, there is no way to upgrade the eMMC SSD utilized in the SC Compute Stick. There is an alternative, however. You can augment the eMMC SSD with a microSD flash disk up to 128GB in size. Once installed (and NTFS formatted for best performance), there are parameters in the Windows 10 Setup program that you can use to specify what content you want Windows to store on the flash disk. From the Setup program's main screen, click on System, then Storage and then on Change where new content is saved.
Hope this helps,