Option to avoid deleted files on target to reappear later

[bebelalu55]

Hello, I am new on this forum, sorry if this has been covered already.

I have a master HDD for my digital music collection on which I add new items (CD rips, Web downloads from QoBuz, old cassettes converted to digital...) or perform some editing.
I then make a copy (obviously using FreeFileSync) on a microSD for my DAP (music player), ensuring the existence of a backup at the same time.
I can delete files I do not like on the DAP.
But when I copy a new batch, the deleted files will reappear. I cannot find a suitable option to avoid this.
There would need a new icon (Bin?) for files that are absent on the target drive but where present last time with add source / ignore option. This would obviously require the use of the database.

Could you look into this?

Many thanks

[Plerry]

Perhaps you can use the Time-span function in FFS, by only copying recent (left-side) files.

[xCSxXenon]

Filters or time-span
FFS can't know what you do and don't want on the SD card

[bebelalu55]

Thank you both for your input.
Your suggestion would need modifying the parameters each time using the last Sync date, possible as it shows on the job list.
FFS does known what happens on the right hand side drive as it can identify new, modified files to process them in 'Two Way' mode.
Anyway you gave me a temporary solution:
In fact I generate the ffs_gui file according to the presence of certain files in the folders (tags).
I can extract the last sync date from the logs and use it in the TimeSpan field.
Worth trying next time...