Cheat Engine

[ByTransient]

I did some research, but the results were ineffective.

I don't want to delete or recreate the folder.
How can I test if the folder exists without opening it?

[ParkourPenguin]

Can't with stock Lua.

Maybe the CE function getDirectoryList would be of use to you.

[Dark Byte]

[ByTransient]

[Corroder]

Example (on your case):

[ByTransient]

Yes @Corroder this works fine.
Thanks for adding a new approach

There are some terms that I normally use;
([[mkdir "]]) = Create folder.
([[rmdir "]]) = Delete folder.

([[cd "]]) = I'm just seeing this.
Please give the reference or explanation of "([[cd"]]) "?

And also @DarkByte, I have a question;
Does the "lfs" example you gave above include the following commands?
Lua does not define "lfs", you gave an example in CE.
All or which of the following codes are defined in CE?

Reference
LuaFileSystem offers the following functions:

lfs.attributes (filepath [, request_name | result_table])
Returns a table with the file attributes corresponding to filepath (or nil followed by an error message and a system-dependent error code in case of error). If the second optional argument is given and is a string, then only the value of the named attribute is returned (this use is equivalent to lfs.attributes(filepath)[request_name], but the table is not created and only one attribute is retrieved from the O.S.). if a table is passed as the second argument, it (result_table) is filled with attributes and returned instead of a new table. The attributes are described as follows; attribute mode is a string, all the others are numbers, and the time related attributes use the same time reference of os.time:
dev
on Unix systems, this represents the device that the inode resides on. On Windows systems, represents the drive number of the disk containing the file
ino
on Unix systems, this represents the inode number. On Windows systems this has no meaning
mode
string representing the associated protection mode (the values could be file, directory, link, socket, named pipe, char device, block device or other)
nlink
number of hard links to the file
uid
user-id of owner (Unix only, always 0 on Windows)
gid
group-id of owner (Unix only, always 0 on Windows)
rdev
on Unix systems, represents the device type, for special file inodes. On Windows systems represents the same as dev
access
time of last access
modification
time of last data modification
change
time of last file status change
size
file size, in bytes
permissions
file permissions string
blocks
block allocated for file; (Unix only)
blksize
optimal file system I/O blocksize; (Unix only)
This function uses stat internally thus if the given filepath is a symbolic link, it is followed (if it points to another link the chain is followed recursively) and the information is about the file it refers to. To obtain information about the link itself, see function lfs.symlinkattributes.
lfs.chdir (path)
Changes the current working directory to the given path.
Returns true in case of success or nil plus an error string.
lfs.lock_dir(path, [seconds_stale])
Creates a lockfile (called lockfile.lfs) in path if it does not exist and returns the lock. If the lock already exists checks if it's stale, using the second parameter (default for the second parameter is INT_MAX, which in practice means the lock will never be stale. To free the the lock call lock:free().
In case of any errors it returns nil and the error message. In particular, if the lock exists and is not stale it returns the "File exists" message.
lfs.currentdir ()
Returns a string with the current working directory or nil plus an error string.
iter, dir_obj = lfs.dir (path)
Lua iterator over the entries of a given directory. Each time the iterator is called with dir_obj it returns a directory entry's name as a string, or nil if there are no more entries. You can also iterate by calling dir_obj:next(), and explicitly close the directory before the iteration finished with dir_obj:close(). Raises an error if path is not a directory.
lfs.lock (filehandle, mode[, start[, length]])
Locks a file or a part of it. This function works on open files; the file handle should be specified as the first argument. The string mode could be either r (for a read/shared lock) or w (for a write/exclusive lock). The optional arguments start and length can be used to specify a starting point and its length; both should be numbers.
Returns true if the operation was successful; in case of error, it returns nil plus an error string.
lfs.link (old, new[, symlink])
Creates a link. The first argument is the object to link to and the second is the name of the link. If the optional third argument is true, the link will by a symbolic link (by default, a hard link is created).
lfs.mkdir (dirname)
Creates a new directory. The argument is the name of the new directory.
Returns true in case of success or nil, an error message and a system-dependent error code in case of error.
lfs.rmdir (dirname)
Removes an existing directory. The argument is the name of the directory.
Returns true in case of success or nil, an error message and a system-dependent error code in case of error.
lfs.setmode (file, mode)
Sets the writing mode for a file. The mode string can be either "binary" or "text". Returns true followed the previous mode string for the file, or nil followed by an error string in case of errors. On non-Windows platforms, where the two modes are identical, setting the mode has no effect, and the mode is always returned as binary.
lfs.symlinkattributes (filepath [, request_name])
Identical to lfs.attributes except that it obtains information about the link itself (not the file it refers to). It also adds a target field, containing the file name that the symlink points to. On Windows this function does not yet support links, and is identical to lfs.attributes.
lfs.touch (filepath [, atime [, mtime]])
Set access and modification times of a file. This function is a bind to utime function. The first argument is the filename, the second argument (atime) is the access time, and the third argument (mtime) is the modification time. Both times are provided in seconds (which should be generated with Lua standard function os.time). If the modification time is omitted, the access time provided is used; if both times are omitted, the current time is used.
Returns true in case of success or nil, an error message and a system-dependent error code in case of error.
lfs.unlock (filehandle[, start[, length]])
Unlocks a file or a part of it. This function works on open files; the file handle should be specified as the first argument. The optional arguments start and length can be used to specify a starting point and its length; both should be numbers.
Returns true if the operation was successful; in case of error, it returns nil plus an error string.

Thanks in advance for the answers.

EDIT:
I'm trying to delete a folder.
Operations applied and their results;
1) The folder can be deleted manually.
2) Changing the folder name manually and with "os.rename".
3) Folder size ranges from 110 MB to 1 GB.
4) The folder cannot be deleted with "os.execute ([[rmdir"]]) ". (Lower size folders can be deleted)
5) The folder is not deleted with "os.remove". (Smaller sized folders can be deleted)
6) I tried changing the folder name and deleting it, the name changes but is not deleted.

What can I do?

[Dark Byte]

before you can delete a folder (rmdir) you need to delete all files and subfolders in that folder (excluding the folders named "." and ".." because it's a bad idea to recursively delete everything in "..")

[ByTransient]

@DB, subfolders and folders are 1300 and as you said it's pretty hard to do this.
Also, the files will have variable names and versions as they are updated by the game.
This will not produce the same result for every user.

But I solved this
It will delete the file and not throw it in the recycle bin.
In addition, there will not even be a confirmation notification.
Here is the code;

[Corroder]

[ByTransient]