If you stored your PDF files on your memory card, but you by mistake deleted pdf files from memory card. You may also by mistake reformat memory card and lost pdf files on your memory card. Do not worry, you can restore the deleted PDF files from memory card with professional data recovery software. Here's a good one
How to recover deleted files from memory card
The memory card data recovery software is easy to use. You can recover deleted photos, videos, songs, documents, and other files from memory card. The memory card data recovery software can recover both deleted and formatted PDF files from all memory card, such as SD card, MicroSD, SDHC, SDXC, CF card, SD mini. You can recover deleted PDF files from Transcend, SanDisk, Kingston, Sony, Panasonic, Samsung, Toshiba, PNY, Lexar memory card.
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