Yeah, the adapter (SKU 20953) can support TRIM function. Hope this info can help you.
Support UASP SATA III: USB 3.0 to SATA adapter supports UASP Transfer Protocol, 70% Faster than traditional USB 3.0 and 80% reduction in required processor resources, which enables you to utilize the full potential of your SATA III SSD/HDD, when paired with a UASP-enabled host controller. The UASP Transfer Protocol only can accelerate read and write speed of SSD hard disk.
Specially Designed for 2.5" HDD: USB 3.0 to SATA 15+7 pin connector cable allows you to connect any standard 2.5" SATA HDD mobile enclosure to your computer/laptop via USB 3.0 Port at speed up to 5Gbps. It is ideal for you to backup files or upgrades your notebook/PC hard drive. Please be kindly noted that 12V/2A center positive polarity power adapter (Power Adapter is not included) is necessarily required if 3.5" SATA HDD is connected.
Up to 5Gbps Transfer Rates: This is USB 3.0 version, backward compatible with USB 2.0 and 1.0, data transfer rates up to 5Gbps.
Wide Compatibility: Ugreen USB 3.0 SATA hard drive adapter is compatible with Windows 98/2000/XP/Vista/7/8/8.1, Mac OS X. UASP is a transfer protocol, requiring your operation system is Win 8, Win 8.1, Win 10, MAC OS 8 or above.
Easy to Use: USB Universal Serial Bus interface, driver-less, easy and convenient to carry and use.
1. Compatible with SATA revision I/II/III, the actual transmission rate depends on the capability of the connected HDD/SSD.
2. Backward compatible with previous versions of USB ports (1.0, 1.1&2.0).
3. Support Windows 98/2000/XP/Vista/7/8/8.1, Mac OS X. UASP is a transfer protocol, requiring your operation system is Win 8, Win 8.1, Win 10, MAC OS 8 or above.
4. Support 2.5" /3.5" SATA Hard Drive Disk / SSD Solid State Drive, 2.5" Mass Storage Class Drive.
1. No extra power required for 2.5" HDD/SDD.
2. For 3.5" HDD/SDD, Please connect 12V/2A power adapter for stable transmission(Power adapter is not included in the package).
3. For UASP, only when your devices, hard drives and system are UASP supported, then the speed can be 20% faster.
1 x USB 3.0 to SATA Adapter
1 x Warranty Card