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| Extension | File Type Developer | File Category | File Type Description | Software | Software Developer |
|---|---|---|---|---|---|
| .SP1 | Microsoft Corporation | Data Files | Microsoft Windows XP With Service Pack 1 Installation Data | ShadowProtect | StorageCraft |
| .SP4 | Solutions Etcetera | Data Files | SuperCard 4 Player Project | ShadowProtect | StorageCraft |
| .SPF | StorageCraft | Backup Files | ShadowProtect Full Backup File | ShadowProtect | StorageCraft |
| .SPI | StorageCraft | Backup Files | ShadowProtect Incremental Backup File | ShadowProtect | StorageCraft |
| .SPWB | StorageCraft | Uncommon Files | ShadowProtect Write Buffer | ShadowProtect | StorageCraft |
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