I have a rca lap top computer and i wont too erase unwonted photos from my device folder

You should be able to connect the phones on the go cable to lap top usb. Depending on your phone model it will ask permission whether you want to transfer photos or it may say transfer files. Open files folder of the phone on the laptop. Look for the dcim folder. Ctrl +a & ctrl +v or copy & paste on to a folder or desktop in the lap top. After you are sure you have all files where you want on the laptop go to phone dcim folder. Open select all via ctrl +a and delete by ctrl x.

There a number of FILE MANAGER programs you can download to manipulate files.
a safe site is :
http://download.cnet.com/utilities/windows/

I’m happy to help further over the phone at https://www.6ya.com/expert/mike_316638c836088218

How to Transfer Photos: Windows Vista/7 Users If you have Windows 7 or Vista, there are two easy ways to transfer your photos directly to your desired folder or directory.

AutoPlay Method

When your iPhone device is connected, click on the Start Menu, and then Control Panel. Click Hardware and Sound. Select AutoPlay, scroll down to find where your iPhone device is listed, open the drop-down menu, and select "Ask me every time."
Step 1 - Connect your iPhone device
If you enabled the AutoPlay behavior using the method described above, you can skip this step, because your iPhone is already plugged in. If not, connect your device using the appropriate USB cable that your phone came with.
Step 2 - Import Pictures and Video

The AutoPlay prompt should appear with your device type listed at the top. Click the first link that says "Import Pictures and Video."
If for some reason the AutoPlay prompt did not appear, go to Start, then Computer, then right click on the icon for your iPhone device and select "Import pictures and video" from the context menu that appears.
Step 3 - Choose a directory, and import
Before you click Import, go to Import Settings, and select the "Import to" field to select the destination you want your photos to transfer to. By default, they will transfer to your My Pictures folder. You can also select the "Always erase from device after copying" option, though this is, as always, optional.
Click OK, then click Import, and your photos will be transferred to their designated directory.

Windows Explorer

If you don't want to mess with AutoPlay, you can find and transfer your photos manually using Windows Explorer.
Step 1 - Connect your iPhone device
Step 2 - Click Start, then Computer
This should take you to a Windows Explorer page that lists your hard disk drive(s), and devices with removable storage. If connected properly, your iPhone device will register as a device with removable storage, and you will see the icon for it listed below this header.
Step 3 - Double-click your device's logo in Windows Explorer
Double-clicking your device will open it up as a directory, full of folders and sub-folders that store all of your phone's content.
Step 4 - Open your camera folder
Your camera folder should be located in [Your iPhone Device]\Internal Storage\DCIM\100APPLE. This means once you're in your iPhone's directory, click on the Internal Storage folder, then the DCIM folder, then the 100APPLE folder.
Step 5 - Transfer your photos
You can import your device's photos by selecting the ones you want, or pressing Ctrl+A to select them all, and dragging them onto your desktop. Or, you can hit Ctrl+C to copy the photos, and then hit Ctrl+V in the folder you want to copy them into.

If the phone is recognised as a usb drive on the laptop (you may have to enable usb mode on the phone) then usually most pictures are located under a folder named "DCIM"

what model LG phone?

Although I do not have a Galaxy Tablet 3, I own a Samsung Galaxy S3 phone and I believe both might use the same technique.

There are two ways to erase the photos from the gallery. I generally use the first one, using a computer although you may prefer the second one that works directly in the tablet.

In general, when you connect an Android device that has a camera to a computer, it will display in the Windows Explorer an Icon with the name of the device, if Windows has the right drivers for your device installed. At the same time, an icon of a USB connection will be shown in the device's screen top bar.

If you click on your device's icon at the computer, you may find one or two folders (in general, "Card" and "Phone" in cell phones" and "Card" and "Tablet" for tablets). The "Card" folder appears if you have an SD card inserted in your device. Depending on where you set up your tablet to store the photos, inside those two folder you will find another folder called DCIM (that stands for Digital Camera IMages). Check on both to locate where your photos are. Then, select the ones you want to erase or select them all pressing CTRL + A and then press DELETE on your keyboard.

The other way is acting on your tablet. Touch the GALLERY icon to open the Gallery app. If you have more than one folder in your gallery, touch on the folder you want to erase the photos, to select it. If you have only your Camera folder, touch and keep you finger touching any of the photos for around two seconds. The photo will be selected with a green mark and a rectangle will appear at the top, close to the Gallery icon, indicating "1 selected". Touch this rectangle and the option to either "Select all" or "Unselect all" will appear. Selecting all photos will turn them all marked. Then, touch the "Trash can" (delete) icon and you will be asked if you want to delete all pictures. Touch OK and they are all gone! See images 1 and 2 attached to this note.

Hope you may find this information helpful!

Regards,

Miguel L. Martins

Use a card reader to download your pictures to a folder you create on your desktop.

These are the manufacturer's (RCA/Thomssen's) exact words:
"
For users running Windows XP with Service Pack 1 and above:

1. With your device connected to your computer, click on “My Computer” and then click on the icon for your device. If you see a folder labeled “DATA”, you must copy the photo files you want to view directly into this folder. Folders containing photos cannot be copied to the “DATA” folder. Photo files must be copied directly to the “DATA” folder using no other folder.
2. If you do not see a folder labeled “DATA”, then copy the photo files you want to view directly to the device. Folders containing photos cannot be copied to the “DATA” folder. "

-Tha Mp3 Doctor

1. plug in
2. enter device via My Computer
3a(mtp mode).copy and paste from folder to desktop or another folder.
3b(USB mode). enter folder "MTP" and do step 3a.

Make sure the image file is in JPG format, or the player won't be able to read it.

For users running Windows XP with Service Pack 1 and above:
With your device connected to your computer, click on My Computer and then click on the icon for your device. If you see a folder labeled DATA, you must copy the photo files you want to view directly into this folder. Folders containing photos cannot be copied to the DATA folder. Photo files must be copied directly to the DATA folder using no other folder.
If you do not see a folder labeled DATA, then copy the photo files you want to view directly to the device. Folders containing photos cannot be copied to the DATA folder.

Make sure the image file is in JPG format, or the player won't be able to read it.

For users running Windows XP with Service Pack 1 and above:
With your device connected to your computer, click on My Computer and then click on the icon for your device. If you see a folder labeled DATA, you must copy the photo files you want to view directly into this folder. Folders containing photos cannot be copied to the DATA folder. Photo files must be copied directly to the DATA folder using no other folder.
If you do not see a folder labeled DATA, then copy the photo files you want to view directly to the device. Folders containing photos cannot be copied to the DATA folder.