Here is an excerpt from the Speccy .txt snapshot file;
Storage
Hard drivesWDC WD5000LPVX-22V0TT0Manufacturer Western DigitalHeads 16Cylinders 60,801Tracks 15,504,255Sectors 976,768,065SATA type SATA-III 6.0Gb/sDevice type FixedATA Standard ACS2Serial Number WD-WX61AA4PJFK7Firmware Version Number 01.01A01LBA Size 48-bit LBAPower On Count 589 timesPower On Time 28.6 daysSpeed 5400 RPMFeatures S.M.A.R.T., APM, NCQMax. Transfer Mode SATA III 6.0Gb/sUsed Transfer Mode SATA III 6.0Gb/sInterface SATACapacity 465 GBReal size 500,107,862,016 bytesRAID Type NoneS.M.A.R.TStatus GoodTemperature 34 °CTemperature Range OK (less than 50 °C)S.M.A.R.T attributes01Attribute name Read Error RateReal value 0Current 200Worst 200Threshold 51Raw Value 0000000000Status Good03Attribute name Spin-Up TimeReal value 1566 msCurrent 148Worst 145Threshold 21Raw Value 000000061EStatus Good04Attribute name Start/Stop CountReal value 2,305Current 98Worst 98Threshold 0Raw Value 0000000901Status Good05Attribute name Reallocated Sectors CountReal value 0Current 200Worst 200Threshold 140Raw Value 0000000000Status Good07Attribute name Seek Error RateReal value 0Current 200Worst 200Threshold 0Raw Value 0000000000Status Good09Attribute name Power-On Hours (POH)Real value 28d 14hCurrent 100Worst 100Threshold 0Raw Value 00000002AEStatus Good0AAttribute name Spin Retry CountReal value 0Current 100Worst 100Threshold 0Raw Value 0000000000Status Good0BAttribute name Recalibration RetriesReal value 0Current 100Worst 100Threshold 0Raw Value 0000000000Status Good0CAttribute name Device Power Cycle CountReal value 589Current 100Worst 100Threshold 0Raw Value 000000024DStatus GoodBFAttribute name G-sense error rateReal value 16Current 84Worst 84Threshold 0Raw Value 0000000010Status GoodC0Attribute name Power-off Retract CountReal value 11Current 200Worst 200Threshold 0Raw Value 000000000BStatus GoodC1Attribute name Load/Unload Cycle CountReal value 8,350Current 198Worst 198Threshold 0Raw Value 000000209EStatus GoodC2Attribute name TemperatureReal value 33 °CCurrent 110Worst 100Threshold 0Raw Value 0000000021Status GoodC4Attribute name Reallocation Event CountReal value 0Current 200Worst 200Threshold 0Raw Value 0000000000Status GoodC5Attribute name Current Pending Sector CountReal value 0Current 200Worst 200Threshold 0Raw Value 0000000000Status GoodC6Attribute name Uncorrectable Sector CountReal value 0Current 100Worst 253Threshold 0Raw Value 0000000000Status GoodC7Attribute name UltraDMA CRC Error CountReal value 0Current 200Worst 200Threshold 0Raw Value 0000000000Status GoodC8Attribute name Write Error Rate / Multi-Zone Error RateReal value 0Current 100Worst 253Threshold 0Raw Value 0000000000Status GoodPartition 0Partition ID Disk #0, Partition #0File System NTFSVolume Serial Number 74CFAA9BSize 599 MBUsed Space 261 MB (43%)Free Space 338 MB (57%)Partition 1Partition ID Disk #0, Partition #1Size 300 MBPartition 2Partition ID Disk #0, Partition #2Disk Letter C:File System NTFSVolume Serial Number 9C5C7CD8Size 449 GBUsed Space 77 GB (17%)Free Space 371 GB (83%)Partition 3Partition ID Disk #0, Partition #3File System NTFSVolume Serial Number F0D24883Size 15.4 GBUsed Space 13.8 GB (89%)Free Space 1.57 GB (11%)Seagate Expansion USB DeviceHeads 16Cylinders 121,601Tracks 31,008,255Sectors 1,953,520,065SATA type SATA-III 6.0Gb/sDevice type FixedATA Standard ACS2Serial Number WD-WX61AA4PJFK7Firmware Version Number 01.01A01LBA Size 48-bit LBAPower On Count 589 timesPower On Time 28.6 daysSpeed 5400 RPMFeatures S.M.A.R.T., APM, NCQMax. Transfer Mode SATA III 6.0Gb/sUsed Transfer Mode SATA III 6.0Gb/sInterface USB (SATA)Capacity 931 GBReal size 1,000,204,885,504 bytesRAID Type NoneS.M.A.R.TStatus GoodTemperature 34 °CTemperature Range OK (less than 50 °C)S.M.A.R.T attributes01Attribute name Read Error RateReal value 0Current 200Worst 200Threshold 51Raw Value 0000000000Status Good03Attribute name Spin-Up TimeReal value 1566 msCurrent 148Worst 145Threshold 21Raw Value 000000061EStatus Good04Attribute name Start/Stop CountReal value 2,305Current 98Worst 98Threshold 0Raw Value 0000000901Status Good05Attribute name Reallocated Sectors CountReal value 0Current 200Worst 200Threshold 140Raw Value 0000000000Status Good07Attribute name Seek Error RateReal value 0Current 200Worst 200Threshold 0Raw Value 0000000000Status Good09Attribute name Power-On Hours (POH)Real value 28d 14hCurrent 100Worst 100Threshold 0Raw Value 00000002AEStatus Good0AAttribute name Spin Retry CountReal value 0Current 100Worst 100Threshold 0Raw Value 0000000000Status Good0BAttribute name Recalibration RetriesReal value 0Current 100Worst 100Threshold 0Raw Value 0000000000Status Good0CAttribute name Device Power Cycle CountReal value 589Current 100Worst 100Threshold 0Raw Value 000000024DStatus GoodBFAttribute name G-sense error rateReal value 16Current 84Worst 84Threshold 0Raw Value 0000000010Status GoodC0Attribute name Power-off Retract CountReal value 11Current 200Worst 200Threshold 0Raw Value 000000000BStatus GoodC1Attribute name Load/Unload Cycle CountReal value 8,350Current 198Worst 198Threshold 0Raw Value 000000209EStatus GoodC2Attribute name TemperatureReal value 33 °CCurrent 110Worst 100Threshold 0Raw Value 0000000021Status GoodC4Attribute name Reallocation Event CountReal value 0Current 200Worst 200Threshold 0Raw Value 0000000000Status GoodC5Attribute name Current Pending Sector CountReal value 0Current 200Worst 200Threshold 0Raw Value 0000000000Status GoodC6Attribute name Uncorrectable Sector CountReal value 0Current 100Worst 253Threshold 0Raw Value 0000000000Status GoodC7Attribute name UltraDMA CRC Error CountReal value 0Current 200Worst 200Threshold 0Raw Value 0000000000Status GoodC8Attribute name Write Error Rate / Multi-Zone Error RateReal value 0Current 100Worst 253Threshold 0Raw Value 0000000000Status GoodPartition 0Partition ID Disk #1, Partition #0Disk Letter E:File System NTFSVolume Serial Number E280E832Size 931 GBUsed Space 493 GB (53%)Free Space 437 GB (47%)
This also occurs when connecting another USB drive of a different make, the values from the HDD SMART are reported for the External HDD.
I have highlighted the start of the data for each drive. The partition sizes and structure is interpreted per drive but HW IDs and SMART table data is just duplicated. I have tried the portable builds and the result is the same on 32-bit and 64-bit versions of Speccy.