How to solove XTOOL “not enough storage space‘’

Xtool X100 PAD2 "Not enough storage space is availalbe !!

When do the update. 
We consulted with Xtool factory who informed that the memory of older version X100 PAD2 is with 16GB, so customer need to delete some vehicle  such as some Chinese 
models and release some memory.

Here is the error picture.

But how to solve it ? 

Here is the steps 

Step1 、 Open the app and find the Report

Step2 、 Find the "File Management" menu

Step3、Select the "Edit" , click on the unneeded car

Step4、Delete the software. Upgrade Immo software first, and then upgrade diagnostic software

Customers can have this to make it wrok.