Sure thing, just do this:
- Open File Explorer, go to "This PC"
- Right-click the drive and choose Properties
- On the Security tab, click Edit.
- Click Add.
- Type the word "everyone" and click OK.
- Make sure "everyone" is highlighted at the top, then turn on the "allow" checkbox to give everyone full control.
- Click OK to save the permissions, then click OK to save the properties window.
"Everyone" is the Windows term that basically describes "all users not otherwise restricted" (deny always takes precedence over an allow permission). If "everyone" has access, then the permissions are basically wide open.
Consider the physical security of the drive in this arrangement - if someone steals it, they will have full access to the data stored upon it.