In fact, if the data you need to recover is absolutely critical, if it was stored on the same partition as Windows, you *might* want to cut power to the device rather than taking the small risk from shutting it down normally. If those files were stored on the same partition as Windows, you don't want that copy of Windows running, or it might overwrite the data you need as part of its normal operation. If you need to recover files, you don't want to overwrite them. And since recovery is non-destructive, there's no reason you can't use more than one recovery app, trying a 2nd, or 3rd etc. You will need somewhere to store recovered files. It is possible to do a complete, sector by sector or cluster by cluster image back up of the partition, restoring that to another drive partition, and running the recovery operation on that, since that sort of backup includes the free space where that file data you hope to recover is stored.

Some file recovery apps, including Magic Uneraser Home, offer a quicker scan feature, plus a deep scan that searches the entire drive, which can take quite some time depending on the size of the drive & its speed. Magic Uneraser Home, like other file recovery apps, looks for chunks of data on the drive, then attempts to put them together into the files that were originally stored. Leaving data in place doesn't work as well with SSDs however, since data has to be removed before it can be replaced in a 2nd step, so deleted data may be removed proactively to speed up future writes to the drive. On a regular hard drive that data will remain until some other data is written to the physical space it occupies. When a file is permanently deleted - not just sent to the Recycle Bin - it's removed from that index, but the stored data remains.

Data is stored in small chunks, with tables that act as an index, listing which of those small chunks of data make up which files, & where each is physically located.

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