The R-44 has a pretty good file naming scheme. You can either have files auto-name with full date and time details, or you can preset a filename pattern, like "Take" or "Scene" or whatever - the R-44 then numbers the files appropriately (take_001, take_002 etc etc).
From the manual -
"If there is only one channel, a monaural WAV file will be created with a name consisting
of the project name and a .wav extension
If there are 2–4 channels, a folder will be created with a name consisting of the project
name plus an extension of .pjt. In that folder, monaural WAV files will be created with
names consisting of the channel number and a .wav extension"
Here (FWIW) I have preset names as follows -
Rehearsal
Part One
Part Two
Test
Take
Then in recording setup you choose which preset name to use for the files or folders you are about to record.