Looking Beyond the iStorage diskAshur PRO3 512GB Hardware-Encrypted? 6 Alternatives Worth a Look

How the Alternatives Compare to PRO3

iStorage diskAshur PRO2 512GB Secure SSD

The diskAshur PRO2 shares the 512GB capacity and FIPS Level 3 certification of the PRO3, but it is lighter and more compact. It weighs only 8 ounces and measures 4.88 by 3.31 inches, making it easier to carry in a pocket. You lose the larger chassis, but gain portability. This model suits professionals who need rugged, certified security in a smaller form factor. It retains the same hardware encryption standards, ensuring your data remains protected. The trade-off is a slightly different physical footprint. If you prioritize a lighter drive without sacrificing certification levels, this is a strong alternative. It offers the same security foundation with improved ergonomics for travel.

iStorage diskAshur2 512GB Encrypted Portable SSD

The diskAshur2 drops the FIPS Level 3 certification but keeps hardware encryption and password protection. It is significantly lighter at 7.62 ounces and thinner at 0.59 inches. This makes it more portable than the PRO3, which weighs 1.21 pounds. You give up the highest government certification level, but you gain a more compact design. This drive fits users who need secure storage but do not require strict FIPS compliance. The 512GB capacity remains the same, so your storage needs are met. It is a practical choice for general secure backups. The reduced weight and size make it easier to carry daily. You trade certification prestige for physical convenience.

iStorage diskAshur3 SSD 512GB

The diskAshur3 SSD offers the same 512GB capacity and physical keypad security as the PRO3. It lacks the explicit FIPS Level 3 mention in the provided data, focusing instead on hardware encryption and password protection. The dimensions are identical to the PRO3, measuring 5.16 by 3.27 inches. This model is positioned as a budget option, providing similar security features at a lower price point. You get the same tactile keypad experience for data protection. The primary difference is the certification status. If you need the physical interface and secure storage without the specific FIPS label, this is a viable choice. It maintains the same form factor and security basics.

Apricorn Aegis Fortress L3 8TB Encrypted SSD

The Apricorn Aegis Fortress L3 8TB provides vastly more storage than the 512GB PRO3. It retains FIPS validation and hardware encryption, ensuring high security for large datasets. The drive is slightly lighter at 1 pound and has a similar footprint, measuring 4.75 by 3 inches. You gain 16 times the capacity while maintaining robust security standards. This model suits users who need to store large files securely. The trade-off is potentially slower speeds, as capacity often impacts performance in encrypted drives. It is ideal for archiving sensitive data. The physical size is comparable, making it easy to transport. You prioritize storage volume without compromising on certification or encryption.

Western Digital 2TB My Passport Portable SSD

The Western Digital My Passport 2TB offers four times the capacity of the PRO3 at 2TB. It uses hardware encryption and password protection for security. The drive is much smaller and lighter, measuring 3.5 by 1.8 inches and lacking weight data but noted as compact. It provides fast NVMe speeds, which likely exceed the PRO3’s 448 MB/s read rate. You gain significant storage and speed but lose the FIPS Level 3 certification and physical keypad. This model fits users who want high capacity and performance without enterprise-grade security features. It is a solid choice for secure data transport. The compact size makes it highly portable. You trade certification and keypad for capacity and speed.

iStorage diskAshur M2 240GB Encrypted Portable SSD

The diskAshur M2 240GB is much smaller and lighter than the PRO3. It weighs 9.52 ounces and measures 4.37 by 1.77 inches. It retains hardware encryption and FIPS validation, offering strong security in a compact form. However, the 240GB capacity is less than half of the PRO3’s 512GB. You give up storage space for portability. This drive suits users who need secure, rugged storage for small critical files. The physical keypad is not mentioned, but security remains high. It is ideal for limited-space environments. You trade capacity for a smaller footprint. The reduced size makes it easier to carry. It offers the same security foundation in a more compact package.

Quick picks

Our 7 picks

1 Best overall

iStorage diskAshur PRO3 512GB Hardware-Encrypted SSD

Best for: FIPS 140-3 Level 3 certified secure storage

Storage Capacity

512GB

Max Read Speed

Up to 448 MB/s

Max Write Speed

Up to 444 MB/s

Security

Hardware Encryption, Password Protection, FIPS Validated

Dimensions

5.16 × 3.27 × 0.82 inches

Weight

1.21 pounds

View on Amazon: iStorage diskAshur PRO3 512GB Hardware-Encrypted SSD Affiliate link

The iStorage diskAshur PRO3 SSD 512GB is a secure portable drive with FIPS 140-3 Level 3 certification. It uses AES-XTS 256-bit hardware encryption and an 8–64-digit PIN for access. Read speeds reach 448 MB/s and write speeds reach 444 MB/s. It requires no software and works with USB ports on various devices. This drive suits users needing government-grade security for sensitive data.

Pros

• FIPS 140-3 Level 3 certified for compliance
• AES-XTS 256-bit hardware encryption
• Up to 448 MB/s read speed
• No software installation required
• Backlit alphanumeric keypad

Cons

• Limited to 512GB capacity
• Heavier at 1.21 pounds
• Larger dimensions than standard SSDs

Good fit if

• You need FIPS 140-3 Level 3 certification
• You require hardware encryption without software
• You store sensitive data on portable drives

Skip if

• You need more than 512GB storage
• You prefer a lightweight and compact drive
• You want higher sequential read speeds

Verdict: iStorage diskAshur PRO3 SSD 512GB is a secure option for users who prioritize FIPS 140-3 Level 3 certification and hardware encryption over capacity and portability.

2 Also great

iStorage diskAshur PRO2 512GB Secure SSD

Best for: FIPS Level 3 secure portable storage

Storage Capacity

512GB

Interface

USB 3.2

Form Factor

Portable

Max Read Speed

Up to 361MB/s

Max Write Speed

Up to 358MB/s

Security

Hardware Encryption, Password Protection, FIPS Validated

View on Amazon: iStorage diskAshur PRO2 512GB Secure SSD Affiliate link

The iStorage diskAshur PRO2 is a 512GB portable SSD with FIPS 140-2 Level 3 certification. It uses AES-XTS 256-bit hardware encryption and requires a 7-15 digit PIN for access. Transfer speeds reach 361MB/s read and 358MB/s write. The rugged design is IP56 certified for dust and water resistance. It works with Windows, macOS, and Linux without extra software.

Pros

• FIPS 140-2 Level 3 certified hardware encryption
• IP56 dust and water resistant rugged build
• 361MB/s read and 358MB/s write speeds
• No software installation required for authentication

Cons

• 512GB capacity is smaller than 8TB alternatives
• Maximum write speed is slower than NVMe drives
• Graphite color option limits aesthetic choices

Good fit if

• You need FIPS Level 3 compliance for regulated data
• You require a rugged drive for field use
• You want password protection without software setup

Skip if

• You need storage capacity larger than 512GB
• You require the fastest possible sequential write speeds
• You prefer a drive with a display for PIN entry

Verdict: The iStorage diskAshur PRO2 512GB FIPS 3 is a secure, rugged drive for users who need FIPS Level 3 certification and physical durability. It fits professionals handling sensitive data in harsh environments who do not need high-capacity storage.

3 Also great

iStorage diskAshur2 512GB Encrypted Portable SSD

Best for: secure portable storage with physical ruggedness

Storage Capacity

512GB

Interface

USB 3.2

Form Factor

Portable

Max Read Speed

Up to 361MB/s

Max Write Speed

Up to 358MB/s

Security

Hardware Encryption, Password Protection

View on Amazon: iStorage diskAshur2 512GB Encrypted Portable SSD Affiliate link

This is a 512GB portable SSD with a fiery red finish. It uses AES-XTS 256-bit hardware encryption and requires a 7-15 digit PIN for access. You get read speeds up to 361MB/s and write speeds up to 358MB/s over USB 3.2. It is IP56 certified for dust and splash resistance. It works without software on Windows, macOS, Linux, and Android.

Pros

• AES-XTS 256-bit hardware encryption
• IP56 dust and splash resistance
• Read speeds up to 361MB/s
• No software required for operation
• Common Criteria EAL 5+ certified

Cons

• 512GB capacity is smaller than 8TB options
• Read speeds are slower than modern NVMe drives
• Heavier build at 7.62 ounces

Good fit if

• You need hardware encryption without installing software
• You work in dusty or wet environments
• You require Common Criteria EAL 5+ certification

Skip if

• You need storage larger than 512GB
• You require maximum transfer speeds
• You prefer a lightweight portable drive

Verdict: iStorage diskAshur2 512GB Red SSD is a rugged, secure drive for users who prioritize data protection and physical durability over raw speed or high capacity.

4 Also great

iStorage diskAshur3 SSD 512GB

Best for: secure portable storage with physical keypad

Storage Capacity

512GB

Max Read Speed

Up to 448 MB/s

Max Write Speed

Up to 444 MB/s

Security

Hardware Encryption, Password Protection

Dimensions

5.16 × 3.27 × 0.82 inches

View on Amazon: iStorage diskAshur3 SSD 512GB Affiliate link

The iStorage diskAshur3 SSD 512GB is a secure portable drive featuring hardware encryption and a physical keypad. It delivers read speeds up to 448 MB/s and write speeds up to 444 MB/s. The device uses AES-XTS 256-bit encryption and requires an 8–64-digit PIN for access. It is software-free and works across multiple operating systems. This drive suits users who need FIPS 140-3 Level 3 compliance and reliable data protection without installing drivers.

Pros

• AES-XTS 256-bit hardware encryption
• Read speeds up to 448 MB/s
• Write speeds up to 444 MB/s
• FIPS 140-3 Level 3 compliant firmware
• No software installation required

Cons

• 512GB capacity is smaller than 2TB or 8TB options
• Maximum read speed is lower than faster NVMe-based drives
• Physical keypad adds bulk compared to slim USB sticks

Good fit if

• You need FIPS 140-3 Level 3 compliance
• You want a drive that works without installing software
• You prefer physical PIN entry over software authentication

Skip if

• You require capacities larger than 512GB
• You need maximum transfer speeds above 448 MB/s
• You prefer a minimalist design without a keypad

Verdict: iStorage diskAshur3 SSD 512GB offers strong security with FIPS compliance and a physical keypad for users who prioritize data protection over raw speed or large capacity.

5 Best premium

Apricorn Aegis Fortress L3 8TB Encrypted SSD

Best for: Large capacity FIPS validated storage

Storage Capacity

8TB

Interface

USB 3.0

Form Factor

Portable

Security

Hardware Encryption, FIPS Validated

Dimensions

4.75 × 3 × 0.9 inches

Weight

1 pounds

View on Amazon: Apricorn Aegis Fortress L3 8TB Encrypted SSD Affiliate link

This is an 8TB portable SSD with USB 3.0 connectivity. It features 256-bit AES XTS hardware encryption and FIPS 140-2 Level 3 validation. The drive includes separate admin and user modes, two read-only modes, and brute-force defense. You should choose this if you need large storage with high-level security. It suits users who require rugged, validated protection for sensitive data.

Pros

• 8TB storage capacity
• FIPS 140-2 Level 3 validated
• 256-bit AES XTS encryption
• Separate admin and user modes

Cons

• USB 3.0 interface limits speed
• 1 pound weight adds bulk
• No mention of software management tools

Good fit if

• You need 8TB of secure storage
• You require FIPS 140-2 Level 3 validation
• You want separate admin and user access

Skip if

• You need USB 3.2 or Thunderbolt speeds
• You prefer a lighter, more compact drive
• You do not need hardware encryption

Verdict: Apricorn Aegis Fortress L3 8TB offers robust security for large files. It fits users who prioritize FIPS validation and high capacity over transfer speed.

6 Best 2tb

Western Digital 2TB My Passport Portable SSD

Best for: High-capacity secure portable storage

Storage Capacity

2TB

Interface

USB 3.2 Gen-2

Form Factor

Portable External

Max Read Speed

1050MB/s

Max Write Speed

1000MB/s

Security

Hardware Encryption, Password Protection

View on Amazon: Western Digital 2TB My Passport Portable SSD Affiliate link

The Western Digital 2TB My Passport SSD offers NVMe speeds up to 1050MB/s read and 1000MB/s write. It includes password-enabled 256-bit AES hardware encryption for data security. The drive is drop resistant up to 6.5 feet and uses USB 3.2 Gen-2. It suits users needing large portable storage with strong encryption and fast transfer rates.

Pros

• 2TB storage capacity
• Up to 1050MB/s read speed
• 256-bit AES hardware encryption
• Drop resistant up to 6.5 feet

Cons

• No FIPS validation listed
• No dedicated hardware keypad
• No USB-C to USB-C cable included

Good fit if

• You need 2TB of portable storage
• You want password-protected hardware encryption
• You prioritize fast NVMe transfer speeds

Skip if

• You require FIPS 140-2 validation
• You prefer a drive with a physical keypad
• You need more than 2TB capacity

Verdict: The Western Digital 2TB My Passport SSD fits users who need high-capacity portable storage with password encryption and fast NVMe speeds. It is a solid choice for secure data transport without the bulk of enterprise-grade drives.

7 Best budget

iStorage diskAshur M2 240GB Encrypted Portable SSD

Best for: rugged hardware-encrypted travel storage

Storage Capacity

240GB

Interface

USB 3.2

Form Factor

Portable SSD

Max Read Speed

Up to 370MB/s

Max Write Speed

Up to 370MB/s

Security

Hardware Encryption, FIPS Validated

View on Amazon: iStorage diskAshur M2 240GB Encrypted Portable SSD Affiliate link

This portable drive gives you PIN-authenticated hardware security in a compact build. It delivers read and write speeds up to 370MB/s over USB 3.2, backed by AES-XTS 256-bit encryption. The 240GB capacity suits basic data storage needs, while the IP68 rating and shockproof exterior protect your files against drops, water immersion, and harsh travel conditions.

Pros

• AES-XTS 256-bit hardware encryption with 7-15 digit PIN access
• IP68 water and dust resistance up to 1.5m for 30 minutes
• Drop-resistant up to 4m and crushproof up to 2.7 tons
• Lightweight build weighing 65g bare or 86g with sleeve

Cons

• Storage capacity is limited to 240GB
• Maximum transfer speeds reach only 370MB/s

Good fit if

• You need extreme physical durability with an IP68 rating.
• You want hardware-level PIN authentication without host software.
• You require an ultra-light drive weighing under 90 grams.

Skip if

• You need more than 240GB of storage space.
• You need transfer rates faster than 370MB/s.

Verdict: iStorage diskAshur M2 240GB Encrypted Portable SSD suits mobile professionals who need rugged, PIN-locked security in a pocket-sized package. Its physical endurance and hardware encryption protect critical smaller archives against both physical hazards and data breaches.

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