Whether or not it is encrypted, one runs the same risk if the disk is not dismounted: the file system can become corrupted, or the USB device, in some cases, can be physically damaged so as to be useless. The risks are twofold:
During the write cycle, part of the data may be cached until committed. If the file system table of contents (TOC) is not updated, ...
Your file looks like random noise or a piece from a binary file,
rather than text.
Evidently, some files were not recovered successfully.
You could try some other recovery tools.
But you should know that the files might be
unrecoverable if their old area on the disk was overwritten by new files.
See the article
Best Free Data Recovery and File Un-delete ...
The partition E: is corrupted. Its "Raw" type indicates that Windows
is unable to even identify the file-system type of the partition.
What you may do:
Verify the SMART status of the disk, to check that it's not failing
Check for disk errors : chkdsk e: /f /r /x
designed to help recover lost partitions.