drama: actual size not increasing to virtual size

[traja47]

starting using virtual box now
host windows 10 pro 64 bits
guest windows 7 pro 64 bits

initially created a storage virtual size = 20 GB
dynamically allocated storage
actual size reached the virtual size
run the command to increase the virtual size to 40 GB

under virtual box manager, storage information:
type (format): normal (vdi)
virtual size: 40 GB
actual size: 21 GB
details: dynamically allocated storage
location: c:\users
attached to: windows7_64bit

downloaded MS SQL express 2014 and when try to run the install file get the following error:
There is not enough disk space on your drive for the new files to be uncompressed and installed

it appears the swap area on the disk is limiting the expansion of the actual size.
need help
question
1) virtual size is 40 GB
how can i increase the actual size from 21 GB to 35 GB?

thanks in advance

[mpack]

Then either you didn't increase the partition size with GParted, and/or you are using snapshots.

This is all in the FAQ: How to resize a Virtual Drive.