The most useful tech cases are ones that are designed to protect your devices from falls, scratches, dust, and other damage.

Tech cases are protective covers made for electronic devices such as phones and tablets. They can provide additional protection from scratches, dust, dirt, and other damage that may occur during normal use. Tech cases come in a variety of styles, materials, and colors, making them suitable for a range of preferences and purposes.

Different type of tech bags and their uses: 

1. Laptop Backpack: Ideal for carrying a laptop, tablet and other related items such as charging cables.

2. Messenger Bag: Great for carrying large items such as documents, textbooks, and books.

3. Tablet Sleeve: Perfect for protecting a tablet from scratches, marks and other damage.

4. Camera Bag: Ideal for carrying cameras and related accessories, such as lenses and tripods.

5. Portable Charger Bag: Great for carrying portable chargers and other tech accessories.

6. USB Hub Pouch: Perfect for protecting USB hubs and other small devices.

7. Security Bag: Ideal for carrying sensitive data and documents, such as passports and IDs.

8. Power Bank Bag: Perfect for carrying extra power banks and keeping them safe while on the go.