Acer Aspire S5-391 Service Manual page 62

In the dialog shown below, set the following options:
3.
• File System: Choose "FAT32"
• Format Options: Select "Quick Format"
Then, click Start to execute the formatting operation.
Click OK to confirm when the following dialog is shown.
4.
When formatting is complete, click OK to close the dialog.
5.
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Figure 2-35. Format USB Flash Disk (2 of 2)
Figure 2-36. Confirm Format
Figure 2-37. Format Complete
System Utilities