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Hello, @Sohoil The number of semaphores required is computed by emFile at runtime like this: - no locking (FS_OS_LOCKING == 0) -> no semaphores - coarse lock granularity (FS_OS_LOCKING == 1) -> 1 semaphore - fine lock granularity (FS_OS_LOCKING == 2) -> 1 + <number of drivers> semaphores @Tobermory When using emFile in library form setting FS_OS_LOCKING has no effect. The required level of locking can be selected by linking the appropriate library. This is the reason why emFile requires 2 semaph…

Hello HaKo, It is not required to explicitly call the FS_SetFileTime() function to set the creation/modification time of a file. All you have to do is to make sure that the FS_X_GetTimeDate() function returns the actual time and date. You can find more information in the section "7.1.2.1 FS_X_GetTimeDate()" of emFile manual. Best Regards, Marius

Hello Shanmuganathan, If your application should act like a USB thumb driver "emUSB Device Pro Bundle" is the package you need. On the other hand, if your application should access information stored on USB thumb drives, then the emUSB Host package is required (see segger.com/emusb-host.html). Best regards, Marius

Hello bloggins666, EFS is a separate component and it must be purchased separately. Please follow the link below to get the price list of emFile components: segger.com/cms/pricelist-emfile.html Best regards, Marius