Question: I'm trying to start some very large Containers on Docker Toolbox (about 18 GB in total). Unfortunately, I always get the error that there is not enough disk space. I have a 1TB HDD and there are more than 200 GB free.

How can I increase the disk space for docker toolbox?

Answer: 
OK, I finally found the solution:

Open Docker Quickstart Terminal, remove the virtual docker-machine and add a new one:

```
 $ docker-machine rm default
 $ docker-machine create -d virtualbox --virtualbox-disk-size "100000" default

```
You can resize without having to delete the VM and recreate it. By default Docker Machine uses VirtualBox, which has the `vboxmanage` command line tool for working with VMs. You can use the [modifymedium](https://www.virtualbox.org/manual/ch08.html#vboxmanage-modifyvdi) command to change disk size:

```
vboxmanage modifymedium docker-vm.vdi --resize 100000

```