The Samsung Galaxy S 4 update, currently rolling out to Galaxy S 4 users over the Verizon, Sprint and AT&T networks. The 350MB+ update allows use of the microSD to store apps (for Sprint and AT&T), fixes glitches and adds other enhancements.
Verizon Update PC/Mac Only
Verizon requires the Software Update Assistant (SUA) that verifies whether your device has the most recent software. When a software update is available and your device is connected to a PC or Mac with a USB cable, the SUA provides an option to install the most recent device software. Please make sure your battery is fully charged, and you are receiving a strong Verizon Wireless or Wi-Fi signal before beginning your software update. The Verizon changelog shows many glitch fixes.