Transferring contents of a large folder (eg 3000 photos) from Android to Windows 10

My mother has a lot of photos (both taken on her Android phone's camera and received as attachments in WhatsApp) which she wants to transfer to her Windows PC for permanent storage and backup to a USB HDD.
The phone is Android 14, Samsung Galaxy A13 SM-A137F/DSN. The PC is Win 10 Pro.
The obvious way would be by USB cable, such that the phone appears as a "pseudo disk drive" in Windows Explorer and files can be selected for copying/moving. I know about the various USB modes: "Transferring files/Android AUto", "USB tethering", "MIDI", "Transferring images", "Charging phone only". Of these, only the two "Transferring" options would seem to be relevant. "Transferring photo" only shows the DCIM folder; "Transferring files" also shows Android/media/com.whatsapp/WhatsApp/Media/Whatsapp Images.
However Windows 10 (unlike Windows 7) seems to crash Explorer as it is gradually transferring the list of files (not the files themselves) in a selected folder (eg DCIM) order to populate the Explorer window so files can be selected.
On Win 7, even a folder with a large number of files (photos), as seen by Windows Explorer, gradually (slowly!) populates with filenames/icons and then allows them to be selected and copied.
Unfortunately this phone only has internal storage, so it's not even possible to copy files to Micro SD card in the phone and then remove it and put it in a card reader on the PC.
Is there is way around this?
Files can be transferred in small quantities as email attachments, but with a folder of 2000+ files, that will take forever. And it needs to an ongoing process, not just a one-off process: as she takes new photos into the DCIM folder or receives them to Whatsapp, she wants to transfer the new files to Windows.
And above all, it needs to be a SIMPLE solution because unlike a Windows PC, I can't connect to the phone remotely by TeamViewer. (I live 200 miles away.)
There are various solutions that transfer by Bluetooth but they also seem to be geared up for selecting fairly small batches of files.
Is there a known problem (and solution!) with Win 10 viewing the contents of a folder on Android via USB if there are a large number of files to be enumerated before copying?