External Drive SMART Support

External Drive SMART Support

TechTool Pro, Lifespan and Drive Scope require a third-party extension, the SAT SMART Driver, to display health data from an external USB (or FireWire) storage device. Even with the SAT SMART Driver installed and loaded, some external storage devices still cannot be read by macOS. As a reminder, the macOS does not natively support displaying health data for connected external USB (or FireWire) storage devices. The only storage devices that are natively supported by macOS are internal solid state and external Thunderbolt connected storage devices. Below, is a list of known external storage devices that are not currently supported by the SAT SMART Driver.

CFast card support

Most CFast media cards are supported when they are connected to the Mac through an external USB adapter with the SAT SMART Driver extension installed and loaded. Professional grade CFast media cards are generally supported, whereas less expensive CFast media cards typically are not supported. For best support, consider using an external Thunderbolt CFast reader instead.

Crucial X8 (or newer) Portable SSD

The Crucial X8 Portable SSD external USB enclosure contains a NVMe-based solid state storage device and is not compatible with the SAT SMART Driver. At this time, there is no native NVMe SMART over USB drivers available in the macOS. Also, there is no manufacturer-specific workaround available since no standard has been created to address devices using this configuration.

OWC Aura SSD

The OWC Aura SSD are not supported since they do not contain SMART data information to read and report back the current overall health or life expectancy of the storage device.

Samsung Portable SSD T5

The Samsung Portable SSD T5 is supported as a SMART capable storage device when the SAT SMART Driver extension is installed and loaded on a Mac using macOS 10.15 ‘Catalina’ or earlier. However, under macOS 11 ‘Big Sur’ or greater with the SAT SMART Driver extension installed and loaded, it is not seen as a SMART capable storage device. We’re looking into the issue, but are unsure of a timeline if support can be added for this USB storage device. 

Samsung Portable SSD T7/T7 Touch

The Samsung Portable SSD T7/T7 Touch external USB enclosure contains a NVMe-based solid state storage device and is not compatible with the SAT SMART Driver. At this time, there is no native NVMe SMART over USB drivers available in the macOS. Also, there’s no manufacturer-specific workarounds available since no standard has been created to address devices using this configuration.

SanDisk Extreme Pro SSD

The SanDisk Extreme Pro SSD external USB enclosure contains a NVMe-based solid state storage device and is not compatible with the SAT SMART Driver. At this time, there is no native NVMe SMART over USB drivers available in the macOS. Also, there’s no manufacturer-specific workarounds available since no standard has been created to address devices using this configuration.

SD cards support

Most SD media cards are supported when they are connected to the Mac through an external USB adapter with the SAT SMART Driver extension installed and loaded. However, SD media cards connected to the internal SD card slot in a Mac are not supported. Professional grade SD media cards are generally supported, whereas less expensive SD media cards typically are not supported. For best support, consider using an external Thunderbolt SD card reader instead.

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