https://www.techpowerup.com/297064/silicon-power-introduces-stream-s05-portable-hard-drive
 
The new Stream S05 from Silicon Power (SP) was designed to be the perfect portable hard drive for saving on the go. The Stream S05 will be your new favorite 2.5" portable hard drive. Intended for everyday use, its compact and lightweight design comfortably fits in your hand for ultimate portability. Bring it with you wherever you go to back-up everything from important documents to irreplaceable memories, reliably and securely. Photos, videos, songs, documents - whatever you need to back-up, the Stream S05 has space for tons of it with up to 5 TB of storage capacity. Plus, a super-speed USB 3.2 Gen 1 Type-A interface delivers rapid transfer rates to cut the time needed for storing your files in a safe place.
 
Features

• Super-speed data transfer with USB 3.2 Gen 1 Type-A interface
• Massive storage capacities available in two different sizes to cater to various needs (S05S-1TB/2TB and S05L-4TB/5TB)
• LED light indicates data transfer activity and power status
• Compact and lightweight design comfortably fits in hand for ultimate portability
• True Plug & Play technology: no software or driver installation needed
• Powered directly from the USB port: no external power source required
• Includes 1 USB Type-A to Type-A cable (23 cm length)
• Free SP Widget software available for download to provide powerful functions such as data backup and restore, AES 256-bit encryption, and cloud storage for efficient data management
• Customization available (by request)

Specifications

• Capacity: (S05S) 1 T2 TB, (S05L) 4 TB/5 TB
• Dimensions: (S05S) 126.5 mm x 79.8 mm x 15.0 mm, (S05L) 126.5 mm x 79.5 mm x 23.5 mm
• Weight: (S05S) 144 g, (S05L) 244 g
• Material: Plastic
• Color: Black
• Interface: USB 3.2 Gen 1 (USB 3.1, USB 3.0, and USB 2.0 backwards-compatible)
• OS Compatibility: Windows 11/10/8.1/8/7/Vista/XP 64-Bit, Mac OS 10.5.x, Linux 2.6.x
• Operating Temperature: 5°C - 55°C
• Storage Temperature: -40°C - 70°C
• Operating Voltage: DC 5 V
• Certification: CE, FCC, BSMI, UKCA, KC
• Warranty: 3 years

A good warranty and up to 5TB of portable storage. I imagine it will fit very well in a pocket of a shirt or pants.