27, May 2017: How to Recover overwritten excel files Windows 7 after delete or format pc hard drive?
Microsoft Excel up until 2007 version used a proprietary binary file format called Excel Binary File Format (.XLS) as its primary format.
Excel 2007 uses Office Open XML as its primary file format, an XML-based format that followed after a previous XML-based format called "XML Spreadsheet" ("XMLSS"), first introduced in Excel 2002.
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Although supporting and encouraging the use of new XML-based formats as replacements, Excel 2007 remained backwards-compatible with the traditional, binary formats. In addition, most versions of Microsoft Excel can read CSV, DBF, SYLK, DIF, and other legacy formats. Support for some older file formats was removed in Excel 2007. The file formats were mainly from DOS-based programs.
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Use "Undelete" to recover deleted overwritten excel files from Windows 7 after Virus attack, Recycle bin clear, disk cleanup, Press shift del by mistake, permanently empty recycle bin, shift delete , accidentally deleted by a mistake.
https://www.aidfile.com/how-to-recover-an-excel-file-after-format-delete.htm
Use "Unformat" mode to recover overwritten excel files from formatted Windows 7 hard drive after quick format, full format, accidentally formatted, reformatting, High-level formatting, Low-level formatting,
Use "Recover partition" mode to recover overwritten excel files if Windows 7 hard drive partitions changed or damaged or deleted invisible partition, lost volume..
Use "Full Scan" mode to recover overwritten excel files if partitions show as "raw" in Windows 10 or recover overwritten files which can not be found with "undelete" and "unformat" and "recover partition", recover overwritten excel files from raw partition, recover files of partitons which are not NTFS, nor exfat, nor fat32 after showing an error, display as raw file system, unformatted, unknown partition, unpartitioned, needs to be formatted.
https://www.aidfile.com/xls-file-recovery.htm