External HDD is a data storage device used for storing and retrieving digital information. It retains the data even when the power is off. External HDD is just like a normal hard drive working outside your computer. They can be connected to the computer via fire wire or USB connection. Digital photos, audio, video, movies can tax your computer storage causing performance to decline as its internal hard drive fills to capacity. External HDD helps to remedy this situation by enabling you to free up storage space on your computers hard drive. External hard drives are portable i.e you can carry this handy device anywhere and can access the data at any time point of time. These portable hard drives are convenient way to share your files and folders with friends. Now a day’s many people are heavily using external hard disk drives for data back up to get rid of data loss due to internal hard drive crash by virus attack, application malfunction etc. However there are certain situations where data from external hard drives can also be lost in such cases use powerful data recovery application like external HDD file recovery tool to recover deleted files on Mac operating system.

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Requirements: Leopard(10.5), Snow Leopard(10.6), Lion(10.7), Mountain Lion(10.8) and Mavericks

You may lose the data from external drives under following circumstances:

Virus Attack: There are different types of virus which can severely affect the external hard disk. If you connect external HDD to virus infected computer for data transfer then virus spread to external drive corrupting all the data located in drive.

Accidental Deletion: Files from external HDD connected to Mac based computers can be accidentally deleted by the users. You might end up in deleting some important files from your external hard disk while deleting some unwanted stuffs. In such case you will need assistance of external HDD file recovery tool to recover accidentally deleted files from external hard drive on Macintosh OS.

Power Surge: Repeated abrupt shut down of a Mac machine when the external hard drive is connected for data transfer results in loss of data from external HDD.

Accidental Formatting: Some times it happen that you accidentally select the external HDD for formatting while on the verge of formatting some internal computer volumes resulting in data loss. Since formatting erases all the data from hard drive and creates a new file system.

Abrupt Ejection: Improper ejection of external HDD from Mac machine without following the operating system commands for removing the external drives results in file system corruption. If the file system gets corrupted the data will be still present in the hard drive but you cannot access it.

Precautionary measuresto avoid data loss:

Above mentioned precautionary measures prevent you from data loss. But if you have already lost the data from external HDD then you should use third party applications to restore files from external hard drive on Mac operating system. This application performs through scanning of missing/deleted Mac volumes with the help of built in scanning algorithm and retrieves various types of files based on their unique signatures. It has an ability to recover files from HFS, HFS+, HFSX, FAT16 and FAT32 partitions/volumes. You can view recovered data in Mac finder styled interface before saving them. It allows you to manually add the signatures for the non-listed files. Along with this it can also recover files which have been emptied from Thrash. This hassle free application can restore deleted files from SD card on Mac based computer and it even supports recovery of files from different memory cards like MMC, XD, CF cards. This application has the ability to recover deleted files from USB drive, Fire Wire drives, iPod, memory sticks.

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Requirements: Leopard(10.5), Snow Leopard(10.6), Lion(10.7), Mountain Lion(10.8) and Mavericks

Steps to recover deleted files from External HDD on Mac:

Step 1: Download and install the application on your PC. Launch the application and Select "Recover Files" option from the main window as shown in Figure 1.

Recover files from External HDD - Main Screen

Figure 1: Select Recover Files Option

Step 2: Select either “Recover Deleted Files” or "Recover Lost Files" option from the next window based on your requirement as shown in Figure 2.

Recover files that are deleted/lost from External HDD - Deleted or lost file selection screen

Figure 2: Select Recover Deleted/Lost Files Option to restore files from External HDD

Step 3: Now, select the External hard drive from where you have to recover files and click on "Next" button as shown in Figure 3.

Restore files from External HDD - External Hard drive selection screen

Figure 3: Select External hard drive to recover files

Step 4: Select the specific file type that you want to recover or skip this step by clicking on “Skip” button as shown in Figure 4.

External HDD recovery - file types selection screen

Figure 4: Select File Types of files that you want to recover

Step 5: Now, view recovered file using “Preview” option as shown in Figure 5. a a

External HDD Recovery - view recovered files

Figure 5: View files that are recovered from External Hard drive

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Requirements: Leopard(10.5), Snow Leopard(10.6), Lion(10.7), Mountain Lion(10.8) and Mavericks