Not enough storage to update to windows 10?

My laptop (Lenovo ThinkPad) needs me to free up space as I have apparently used 111GB and have 7.38GB free. It also shows that I have used 88.1GB on Apps & games. However, when I sort my apps from largest size to smallest and go through the list, the largest size is 2.05gb and the rest of the apps are less than 10GB added up altogether.
For example, the list goes 2.05Gb, 1.28Gb, 1.02Gb, 797mb, 399mb, 363mb, 289mb, 172mb, etc. I want to know how I have used 88.1GB and how to free up space as I am unsure where the other 78gb on apps and games has gone. Thanks in advance for your help

 

Try Windows's own Disk Cleanup first: Start Button > Windows Administrative Tools > Disk Cleanup

 

Thanks for your help, but I only gained 6.45 mb from the disk clean up

 

Try this tool, treesize, it doesn't delete things but it tells you which folder contains the most stuff and allows you to driff down: https://www.jam-software.com/treesize_free/

 

Tech Support Guy System Info Utility version 1.0.0.4
OS Version: Microsoft Windows 10 Enterprise, 64 bit
Processor: Intel(R) Celeron(R) CPU N2940 @ 1.83GHz, Intel64 Family 6 Model 55 Stepping 8
Processor Count: 4
RAM: 3838 Mb
Graphics Card: Intel(R) HD Graphics, 1983 Mb
Hard Drives: C: 118 GB (7 GB Free);
Motherboard: LENOVO, Intel powered classmate PC
Antivirus: Windows Defender, Enabled and Updated

 

i don't know about the serial number or how windows 10 enterprise 64bit got installed but i purchased it in melbourne, victoria, australia(where i live). it is owned by me and i use it at school/for school purposes. this laptop is reccomended to all students at my school and most students use the same type of laptop as mine. although after asking multiple friends about my issue, they have not had the same problem. (i am not very good with tech by the way)

 

Is it your laptop?
https://www3.lenovo.com/au/en/laptops/thinkpad/11e-and-chromebooks/11e/p/22TP2TC150E

 

yoga 11e

 

yes, it is my laptop

 

Info re storage --> see note 2 below tech specs --> https://support.lenovo.com/ni/en/solutions/ht062547?tabName=Solutions
Tech specs --> see encl.