The Samsung T7 Portable SSD is also a portable external SSD from a very well-known and reputable brand: Samsung.
Its storage capacity is about 4,000 GB. It is compact, lightweight, and easy to carry.
It is much faster than a traditional hard drive, quieter, and more shock-resistant.
The maximum file transfer speed is about 1,050 MB/s.
It is very fast for:
copying videos;
installing games;
working with large files.
Its modern high-speed USB connection (10 Gbps) is suitable for:
video games;
studies;
professional work;
video and photo editing.
In practice
For normal use, gaming, studies, or backups, the Samsung T7 is often the safest choice.

The OWC 4TB Envoy Pro FX Portable Rugged External NVMe M.2 SSD is a high-end ultra-fast external SSD, mainly designed for professionals working with video, photography, and large files.
It offers a huge storage capacity of about 4,000 GB.
Shockproof, dust-resistant, and water-resistant, it is ideal for travel and outdoor work.
Its file transfer speed can reach around 2,800 MB/s.
It uses an ultra-fast connection mainly designed for:
MacBook Pro,
high-end PCs,
professional workstations.
It also works with standard USB-C ports, making it compatible with many devices.
It is especially useful for:
4K/8K video editing,
large photo projects,
intensive professional workloads.
Designed to withstand drops and vibrations, it works on both Windows and Mac systems.
Important:
To achieve the best performance, a Thunderbolt 3 or Thunderbolt 4 port is recommended.
With a standard USB connection, speeds may be lower.

The Crucial X9 4TB Portable SSD is a reliable and compact portable external SSD, designed for fast storage of files, games, and backups.
With its storage capacity of about 4,000 GB, this small drive is easy to carry anywhere.
Its maximum file transfer speed reaches around 1,050 MB/s.
It is ideal for:
transferring videos,
installing games,
backing up important files.
Its modern USB-C connection is compatible with many recent devices.
It works with:
Windows PCs,
MacBook and iMac computers,
Android smartphones compatible with OTG.
This SSD is:
faster than a traditional HDD,
silent,
more resistant to shocks.
Compact and lightweight, it can withstand drops from up to about 2 meters.
It is compatible with Windows, Mac, and Android.
Important to know
Like many SSDs rated at 1,050 MB/s, the speed may decrease during very large continuous transfers (several tens or hundreds of GB copied at once).

The Oyen Digital U34 Bolt 4TB is a high-end external SSD designed for users who need extremely high speeds.
With its storage capacity of about 4,000 GB and its next-generation ultra-fast USB connection, it is much faster than standard USB devices.
Its file transfer speed can reach up to 2,800 MB/s.
It connects via USB4 or Thunderbolt 4 (see images below).
It is compatible with:
recent MacBooks,
high-end PCs,
professional workstations.
Compact and portable, it is:
extremely fast,
perfect for 4K/8K video editing,
ideal for transferring very large files,
suitable for intensive professional work.

The SSK External SSD 4TB SD600 is an ultra-fast external SSD designed to store your files (photos, videos, games, backups, etc.).
Thanks to its very large storage capacity of about 4,000 GB, you can store:
hundreds of movies,
many games,
thousands of videos and photos.
It is a modern drive with no moving mechanical parts, making it faster, quieter, and more durable than a traditional HDD.
Its maximum transfer speed can reach 2,000 MB/s. For example, a 10 GB movie can be copied in just a few seconds.
It is ideal for video editing, large files, and gaming, thanks to its ultra-fast USB connection (20 Gbps).
Important:
To achieve 2,000 MB/s, your PC must also support this standard.
Otherwise, the transfer speed will be lower.
Its compact size makes it easy to carry in a pocket, and it has low power consumption.
Compatible with:
smartphones,
MacBooks,
iPhone 15,
tablets.

Product Name: "Fanxiang 4TB SATA SSD 2.5'' SSD SATA III 6 Gb/s Internal Solid State Drive Up to 500 MB/s 3D NAND SLC Cache for Laptop and PC Desktop Performance Boost 7mm(0.28″) S101Q"
Explanation:
The Fanxiang 4TB SATA SSD is a high-performance internal solid-state drive (SSD) designed to enhance the storage capabilities of laptops and desktop PCs. Below are the key features and specifications:
Storage Capacity: The SSD offers a massive 4TB of storage, providing ample space for users who need to store large files like games, videos, software, and other data-heavy applications.
Interface: It uses the SATA III 6 Gb/s interface, which is one of the most common and widely supported interfaces for SSDs. This allows for a maximum data transfer rate of 6Gb/s.
Speed: This SSD provides speeds of up to 500 MB/s, which is suitable for general tasks, including file storage, media editing, and software usage. While not as fast as NVMe SSDs, it offers solid performance for everyday use.
3D NAND and SLC Cache: The SSD utilizes 3D NAND technology for better storage density and durability. It also has an SLC cache (Single-Level Cell) that helps to accelerate write speeds, especially for short bursts of data transfers.
Form Factor: The SSD comes in a 2.5-inch form factor, which is the standard size for most laptops and desktop PCs. Its 7mm (0.28 inches) height ensures compatibility with most devices.
Compatibility: This SSD is perfect for laptops, PC desktops, and other systems that support SATA III connections. It provides a significant performance boost compared to traditional hard drives (HDD), making it ideal for upgrading older systems.
Ideal Use Case: This SSD is perfect for users looking to upgrade their system's storage with fast, reliable performance. It is ideal for storing large files, improving boot times, and speeding up applications.

The Fanxiang S101Q 4TB is a 2.5-inch SATA internal SSD designed to replace an old hard drive in a laptop or desktop PC.
It offers a large storage capacity of around 4000 GB. Thanks to its standard internal SSD format, it is compatible with many laptops and desktop computers. It has the same size as a traditional laptop hard drive and uses a standard SATA connection.
Although it is slower than modern NVMe SSDs, it is still fast enough for everyday use. Its maximum transfer speed reaches approximately 500 MB/s.
This allows:
faster Windows startup
quicker application loading
faster game loading times
It also includes an SLC Cache system, which helps maintain good performance during file transfers.
It is compatible with:
laptops
desktop PCs
some mini PCs
This SSD significantly improves the performance of an older PC equipped with a traditional HDD. Its slim design makes it compatible with most modern laptops.
This SSD is mainly designed for:
replacing an old slow hard drive
getting a large amount of storage at a lower price
storing games, movies, files, and backups
However, it is not an ultra-fast SSD like modern NVMe models or high-end external SSDs such as the Samsung T7.
Fanxiang is a lesser-known Chinese budget brand. User reviews are mixed:
several users say the SSD works well for storage and gaming
others report quality or long-term durability issues

The SanDisk Extreme Portable SSD 4TB is a fast and rugged portable external SSD, widely used for storing files, videos, games, and backups.
It offers a massive storage capacity of around 4000 GB. Compact and designed for easy transport, it is suitable for travel and resistant to shocks.
It delivers transfer speeds of up to 1050 MB/s, allowing fast transfers of videos, games, and backup files.
It is lightweight, features a modern reversible connector, and supports fast connectivity up to 10 Gbps.
Good durability:
against dust
against water splashes
suitable for travel and outdoor use
Firmware updates:
This is an important point, as some older SanDisk Extreme models have experienced known issues such as:
data loss
drive becoming unreadable
sudden disconnections
SanDisk / Western Digital has released firmware updates to fix these issues.
This external SSD is:
faster than a traditional HDD
silent
more resistant to vibrations
Very important note:
Older SanDisk Extreme / Extreme Pro models were involved in a controversy related to firmware problems and data loss. Official firmware updates were released to address these issues.
However, some users still report occasional problems.
What this means in practice:
If you buy this SSD, it is recommended to:
check the firmware version
install the official update
keep a backup of your important data

The Amazon Basics Portable External SSD 1TB is a fast and durable portable external SSD sold under the Amazon Basics brand.
Its storage capacity of around 1000 GB is enough for photos, videos, games, backups, and work files.
It is easy to carry and much faster and more durable than a traditional HDD. It offers a maximum advertised speed of around 2000 MB/s, allowing fast transfer of large files via a USB-C connection.
Important:
Depending on your computer’s port, you may not reach the full 2000 MB/s speed. A very recent USB port is usually required to take full advantage of the performance.
Good durability:
against dust
against water splashes
suitable for travel and transport
It comes in black.
Key points:
This SSD appears to offer high speed, a metal casing, and good cooling performance.