I connect my iPad to memory cards and USB sticks without any issues, I can read and write data effortlessly, and I can do all of this without spending a fortune on Apple. Easy recommendation.

I wanted to transfer large videos from my mobile phone to an SD card since I didn't have enough space on my phone anymore... I haven't tried transferring them with a USB stick, so I don't have an opinion on that. I managed to do my job by transferring images from my digital camera to my phone :-)

Whoever gets it to connect an SD card, it works great. I connect my camera's card to instantly view the raw and jpeg photos on my iPhone. However, I do not recommend it at all for using a flash drive! I put mine in and it destroyed it. All my files were lost forever and not even a specialist can recover them!

I use it to transfer photos and videos from an SD memory card to an iPhone 11. It performs this specific function quickly and without any problems.

However, what it couldn't do (at least in my case) is transfer the data directly to an external hard disk or even after passing through the phone first. While it initially recognized the device, it didn't have the "power" to transfer all the elements. The first 1-2 times it managed to transfer a few files (5-10 files), and then it lost contact and stopped. It goes without saying that the hard disk was connected to a power outlet during the attempt. Eventually, after 3 days, the hard disk [Intenso Premium Edition USB 3.0 External SSD 256GB 1.8" Anthracite] was destroyed and no longer works after some unsuccessful attempts to transfer from the iPhone to it.

I reiterate that for transferring from SD to the phone (and only that), it is an excellent and value for money product.

It works as it should. The only difficulty is that the plastic covering the plug is quite thick and does not fit into an iPhone that is in a case. The case needs to be removed.

I use it to transfer photos from an SD card to iPhone 13. It does exactly what it says. If it breaks, I will buy it again.

I searched extensively to find an adapter like the one above, mainly because I need it to transfer the photos I take from the camera's memory card to my iPhone for quick editing in Lightroom.
It's plug and play, you connect it to your phone and it shows you all the photos you have in the "Files" application, with the option to save them to the phone's Photos or directly to an application through the SD card.
I wanted it because I noticed that (at least on Sony) the app that sends the photos significantly reduces the resolution when shooting in Raw format.

Very good. It solves your hands for transferring photos, videos, music, and documents to and from the iPhone. It reads exFat, Fat32, and NTFS, but only for reading in the latter, not editing. I tried all the memory types it accepts in the ports and they are recognized normally. I will buy it again if it breaks or if I lose it.